Plain film radiography uses higher power (100kW) than mammography (3kW). How often is Accuracy of dose calibrator (Ion Chamber) checked? High DQE results in a low dose, is proportional to MTF, is inversely proportional to SNR, and DQE is better at lower spatial resolution (DR>CR). When filling K space during single spin echo imaging, what is the role of frequency encoding steps and phase encoding steps? How is the probability of Compton scatter influenced by (a) the electron density of the tissue and (b) the energy of the incident photons? Key Concepts: Terms in this set (27) GBM. How does mA, kVp, and focal spot differ in Fluoro relative to DR? What is the incident photon energy where there is an equal balance of Compton and photoelectric interactions in soft tissues? Radiography is an imaging technique used to provide internal images of the bones, organs, tissues, and vessels. What type of radiation detector is used in a Geiger Muller counter for hand held radiation surveys? Description Date Stars ... CT flash cards (152 cards) 2020-09-20 14 . What is the equation for image resolution in line pairs per millimeter when given the full width half maximum (FWHM)? What type of radiation detector is used in a well counter for a wipe test? What is the ideal frequency of the RF pulse at 1T, 1.5T, and 3T? Other activities to help include hangman, crossword, word scramble, games, matching, quizes, and tests. What dictates lateral resolution (two adjacent structures, perpendicular to the beam) in ultrasound? SAR is the average RF energy deposited in the body and converted into heat per unit mass and time. Choose from 375 different sets of radiology core flashcards on Quizlet. In its various forms, radiography has been a vital part of modern medicine since its invention allowing us to look deep inside the body and see broken bones, ulcers, benign and cancerous tumors. Cystic form. In spin echo imaging, which gradient is changed with every repetition? What is the wrong dose limit for a radiopharmeceutical medical event? What is the annual whole body dose limit for occupational exposure? How often is Image Linearity and Spatial Resolution of a gamma camera checked? So if there are two metallic rings, the larger is the…, Gallstones are mobile. Feel absorbed dose over 50 mGy during the 2nd to 15 week of gestation. What is the maximum concentration of aluminum ion breakthrough allowed by the NRC in a technetium 99m generator? Leakage radiation from x-ray house measured at 1m must not exceed what level? Normalization in PET done Monthly ("normal month"). Note that "STIR" actually stands for "short tau inversion recovery.". This set of flashcards will cover content associated with the skin and conditions that can happen to the skin that may need to be looked at by a dermatologist. At 80 kVp, how much will this attenuate an X-ray beam? There are 52 cards total. What is the activity limit for a Radiation area in Nucs? What are the typical TR and TE cutoffs for T2 weighted imaging? Quickly memorize the terms, phrases and much more. What is the relationship between dose and spatial resolution with pixel binning? What is the NRC dose rate that defines a restricted area in nuclear medicine? What is the relationship between energy and atomic number (Z) to the photoelectric effect? How much contrast you inject into the tibiotalar joint? Increased kVp results in a decreased linear attenuation coefficient and an increase in the half value layer needed to attenuate 50% of the x-ray beam. Start studying RADIOLOGY CORE. Otherwise, click the red Don't know box. Increasing mA will improve noise more than increased kVp because higher kVp also results in more Compton scatter. Accuracy checked annually (and at installation). How often is Linearity of dose calibrator (Ion Chamber) checked? CTDI vol = (1/3 central CTDI + 2/3 peripheral CTDI)/Pitch. What activity of In-111 is considered a major spill? 331 Cards – 14 Decks – 32 Learners A comprehensive database of more than 18 xray quizzes online, test your knowledge with xray quiz questions. Small anode angle results in a small effective focal spot but with an increased Heel Effect. Information is broken down into modules containing single concepts/topics (e.g., interstitial pulmonary fibrosis). Location. ... Radiology Core Flashcard Maker: Kaleen Burton. Kind of the same … What is reference CTDI vol dose for head CT? According to BEIR VII, cancer incidence increases by how much (% per rad). Cram.com makes it easy to get the grade you want! Linearity checked quarterly (against varying activities of Tc99m). Memorization Made Easy. Midterm 1 Study - Cognitive Science 17 with Johnson at University of California - San Diego - StudyBlue Flashcards 95% Na-Tc99m-O4, 92% Tc99m-MAA, 91% for all other Tc99m (measured via Thin Layer Chromatography). What are the relative strengths of the fundamental universal forces? What MRI sequence is most likely to cause peripheral nerve stimulation? keV = 70 (ave energy will be around k-edge of iodine = 35). Radiology Flashcards. What's is the equation for the energy (E) of a photon of electromagnetic radiation using Plank's constant (h), speed of light (c), frequency (f), and wavelengths (L)? Surface dose rate < 50mrem/hr, exposure at 1m < 1mrem/hr. Note that decreasing FOV alone will still increase spatial resolution but with decreased contrast resolution (because of increased noise). What is the (a) surface does limit and (b) exposure limit at 1 m for "yellow 2" packages? Doubling mA will double the signal but only increase noise by 1.4 (square root of 2 = 1.4). What is the spatial resolution of magnetic resonance imaging? Increasing the dynamic range on ultrasound will decrease image contrast. degree program prepares practitioners (radiologic technologists) to work with patients and physicians, performing a wide variety of diagnostic imaging procedures within the radiology (X-ray) department. What is the relationship between noise and SID? What is the annual equivalent extremity dose limit for occupational exposure? What activity of I-131 is considered a major spill? Gout=-o/+e., MCP … CORE Orthopaedic Medical Center 332 Santa Fe Drive Suite 110 Encinitas, CA 92024 760-943-6700 What is the relationship between mA and kVp to effective focal spot? What is a technical measure of an image system's ability to show contrast across a range of spatial frequencies? Note that the entire time needed to acquire the images = #repetitions x TR. What is the Mean Glandular Dose limit for a breast phantom? What is the affect on exposure time if the focal spot becomes smaller? Study Flashcards On Core Radiology at Cram.com. Cram.com makes it easy to get the grade you want! High Z has more photoelectric effect (PE) and therefore provides greater contrast resolution, especially at an average energy close to its K-edge. Radiography (3mGy), fluoroscopy (30mGy/min), and IR (300mGy/min). What is the primary energy transfer method of heat dissipation by the Anode? For continued ACR accreditation to read mammograms, how many exams must be interpreted over each 2 yr period? What is the reference CTDI vol dose for abdominal CT? Our comprehensive ARRT Certification Exam prep question bank is fully up-to-date and includes over 1,200 questions with detailed answer feedback. EOA=+o/+e. What is the maximum concentration of molybdenum breakthrough allowed by the NRC in a technetium 99m solution at the time of administration? Free flashcards to help memorize facts about CORE Radiology. Study Flashcards On Core Radiology Board Review at Cram.com. How often does ACR require breast imaging to perform a "localization accuracy test" of needle position, position calculations, and user interface? Core radiology exam boards board radiology gi gastrointestinal flash cards flashcards flashcard Learn with flashcards, games, and more — for free. Learn vocabulary, terms, and more with flashcards, games, and other study tools. Does anyone have a link to a Core Radiology Anki deck (or create on yourself you would be willing to share)? What is the relationship between collimation to quantum noise and mA? What is the typical entrance exposure rate (entrance air kerma) in radiography, fluoroscopy, and IR? Exposure time increases with a smaller focal spot, which increases the chance of motion/blur, as in mag views for calcs. Study 169 ASTR101 Final flashcards from McKenna W. on StudyBlue. Geometry checked annually (at at installlation). The Core is the closest resource that comes close to First Aid for USMLE. Soft tissue uses a smooth kernel (low noise, lower spatial resolution), Bone uses a sharp kernel (higher spatial resolution, higher noise). What is the energy and physical half life of Gallium-67? Study 228 BICD 110 Midterm flashcards from Elli M. on StudyBlue. Cortical phase is 1-3 min post injection and is the time split renal function is calculated. Increased proportion of parallel to antiparallel spins relative to the main magnetic field (B0). This also explains why higher frequency probes have improved axial resolution but poor penetration. What is the energy and physical half life of Fluorine-18? Extrinsic (w collimator) is daily, intrinsic (crystal only) is weekly. How much contrast do you inject into the knee joint? What is the minimum energy for ionizing radiation? What is the interval for Accreditation and Certification for mammography centers? What activity of Ga-67 is considered a major spill? CH.6 Merrills Lower limb (59 cards) 2016-09-11 13 . 0.15microCi of Mo per 1milli Tc (measured via photopeak breakthrough). Smaller FOV requires a higher dose to maintain SNR but can increase spatial resolution. What are the Mammogram Training Requirements? Study 137 Exam 3 study flashcards from Mayumi C. on StudyBlue. Consistency checked daily (against a known source, must be within 5%). What is the skin dose resulting in Dry Desquamation? Foot,Ankle,Leg (40 cards) 2019-04-30 14 . Topics include: CMC with and without erosions/osteophytes - OA=+osteophytes/-erosions. Mammography film screen systems have a a more narrow latitude that results in better contrast resolution. What are the valve area values for grading aortic stenosis? Our online xray trivia quizzes can be adapted to suit your requirements for taking some of the top xray quizzes. What is the relationship between energy (kVp) to linear attenuation coefficient and half value layer? Is it better to increase mA or kVp to decrease noise (noise = quantum mottle + scatter)? Free flashcards to help memorize facts about BMO Review- Core. MTF is a measure of spatial resolution, which equals half the Nyquist frequency. What is the best keV to maximize barium contrast? What is the cause for higher SNR in 3T vs 1.5T MRI? with flashcards, quizzing, and games. What is the skin dose resulting in Telangiectasia? Sumer Sethi Radiology Review: Most recommended book by residents who have cleared NEET recently. What is the relationship between max energy (kVp) and average energy to maximize imaging of a contrast agent? T1 (spin-lattice relaxation) time = time to recover 63% of longitudinal magnetization after RF pulse. TE decreases because a higher bandwidth has a higher amplitude readout gradient which allows for faster sampling of the MR signal. What dictates axial resolution (depth, parallel to beam) in ultrasound? To unlock this flashcard set you must be a Study.com Member. What MSD size w/o a visible embryo is diagnostic for fetal demise? What is the reference CTDI vol dose for pediatric abdominal CT? Phase encoding is done in the other shorter matrix dimension and dictates the number of repetitions needed to fill the remainder of the matrix. Therefore, the RF pulse frequency should be 42MHz (1T), 63MHz (1.5T), 126MHz (3T). What is the NRC dose limit for an unrestricted area (secretary space)? What is the relationship between atomic number (Z) photoelectric effect (PE) to image contrast? What is the relative frequency of valvular involvement in rheumatic heart disease? Beam width dictates lateral resolution, and a shorter "focused" beam has improved lateral resolution. How often is Center of Rotation of a gamma camera checked? What is the (a) surface does limit and (b) exposure limit at 1 m for "white 1" packages ? What is the minimum Spatial Resolution required for screen-film mammography? I made a lot of flashcards directly from this book. Radiology Simplified (Apple Books) is the most accurate review of Core-relevant radiology physics anywhere. Same as the annual occupational exposure dose (5rem = 50mSv). Photoelectric effect dominates Compton scatter at lower energies (20-30 KeV), and higher Z materials are much more likely to have photoelectric effect (Z^2)3. What is the skin dose resulting in Moist Desquamation (ulceration)? What is the recommended #cancers/1000 screened? Radiology Core Flashcard Maker: Kaleen Burton. Sampling of the echo occurs during the frequency encoding steps and the number of samples per TR is dictated by one dimension of the matrix (typically the larger dimension because this can be done quickly). Compton scatter interactions involve incident photons and outer shell atomic electrons. Breast closer to detector (decreased SOD) results in magnification (increased dose, increased blur) and reduces scatter received by the image receptor, Cancer identified on routine screening (4.4%), Cancer identified because of biopsy recommendation (25.4%). Use these flashcards to support what you know about speech pathology and to learn more about this very helpful profession. In nuclear medicine renal studies, what time post radiotracer injection is considered the "cortical phase" of imaging? Increasing MRI receiver bandwidth results in a decrease TE and decreased signal-to-noise ratio. 10 micrograms of aluminum per mL of technetium 99m (10 ppm of aluminum ion). 240 exams in 6 months, 3 months of training, 60 hrs of mams education. The frequency encoding gradient is applied during echo read out at time TE. These can be used in conjunction with the Radiology and Nuclear Medicine word search, crossword, and quiz/worksheet. How often is Energy Window of a gamma camera checked? What is the relationship of tube voltage on Compton scatter and photoelectric interaction when the energy of the incident x-ray photons is above the k-edge of the material being imaged? Flash cards covering the combining forms that will be introduced when discussing Radiology and Nuclear Medicine with Anatomy or Health Science students. core radiology boards review flash cards flashcards resident residency neuro neuroradiology. How often is the Blank Scan in PET checked? Program Description. ASTR101 Final - Astronomy 101 with Leonard at California State University - San Diego State University - StudyBlue Flashcards What is the skin dose resulting in Permanent Epilation? Inverse square law = doubling the distance (SID) will quadruple the noise because energy that is twice as far away from the source will spread out over four times the area (resulting in 1/4th the intensity at the image receptor). What is the best keV to maximize iodine contrast? Same as the annual equivalent occupational organ dose limit (50rem = 500mSv). What is the spatial resolution of digital mammography? Surface dose rate < 200mrem/hr, exposure at 1m < 10mrem/hr. How much do you have to decrease photons to double quantum mottle? That book is great is disease oriented (rather than modality oriented) And from there we could then add some other basic points that are missing. What is the ideal flow velocity through a Tips shunt? Exam 3 study - Biochemistry 366 with Perrault at California State University - San Diego State University - StudyBlue Flashcards BICD 110 Midterm - Biology 100 with Reuther at University of California - San Diego - StudyBlue Flashcards How much contrast you inject into the radiocarpal joint? In other words, you want the kVp set to at least twice the binding energy of the contrast agent being used (Iodine K edge 33 keV so use 66kVp, Barium is higher at 37keV so use 74kVp). beta-version (free) Read. How much mA and kVp are required to double Intensity of the X-ray Spectrum? How often is Geometry of dose calibrator (Ion Chamber) checked? Study Flashcards On Core Radiology 10/28/07 at Cram.com. Study 118 Midterm 1 Study flashcards from Graham R. on StudyBlue. What is the relationship between dose and spatial resolution to FOV? Increased mA results in "blooming" of focal spot, but increased kVp results in focal spot "thinning". We've got that in our adaptive radiology flashcards. What is the energy and physical half life of Xenon-133? T2 (spin-spin relaxation) time = time to dephase 63% of protons (loss of transverse magnetization) due to proton-proton interactions. What is the relationship between magnification and SOD to Blur? 3510 Dunhill Street San Diego, CA 921218 58-822-4404. What is the energy and physical half life of Iodine-123? What type of CT kernel is used for soft tissue vs bone? AEC is used in radiography to adjust mA via overall exposure time, and ABC is used in fluoroscopy to adjust kVp, mA, or both during electronic mag (zoom). How long must records of recordable events be stored in Nucs? Study Flashcards On Radiology at Cram.com. Other activities to help include hangman, crossword, word scramble, games, matching, quizes, and tests. Books: Core Radiology is fantastic. Compton is (1/E) and photoelectric is (1/E^3). Maximum SAR is 4W/Kg for whole body over 15 min and 3W/Kg for head imaging over 10 min. 2,052 Cards – 12 Decks – 3 Learners What is the (a) surface does limit and (b) exposure limit at 1 m for "yellow 3" packages? What is the whole body dose limit for a recordable event in Nucs? What is the skin dose resulting in Secondary Ulceration? When you've placed seven or more cards in the Don't know box, click "retry" to try those cards again. I found the clang associations for Step exams super useful, but imagine creating a 15,000 card deck from scratch would be time consuming. Start studying Radiology CORE exam. What is the energy and physical half life of Indium-111? What is the core body temperature threshold change for whole body MRI imaging in adults and in infants? radiation protection (68 cards) 2020-05-24 14 . What activity of TI-201 is considered a major spill? If they move, this distinguishes them f…, The gallbladder is completely filled with stones, or one giant…, 1) Gallstone (mobile, exhibits shadowing)... 2) Gallbladder sludg…, - CD4 < 100... - wide range of appearances…, - CD4 < 200... - bilateral perihilar groun…, 1) anterior pararenal space: ascending and descending colon, 2…, a diverse group of neoplasms that make up the most common retr…, Describe SNAC wrist (scaphoid non-union advanced collapse). What is the affect on SAR when you move from 1.5T to 3.0T? Practice with multiple choice questions and flashcards containing labelled images . RadTechBootCamp is the most powerful solution for those preparing for the American Registry of Radiologic Technologists (ARRT) Certification Exam! What is the NRC annual occupational dose limit in total effective dose equivalents for a worker under 18 years of age. Describe the air gap method used in mammography? What is Radiography? Quality control testing of stereotactic breast biopsy systems are performed at the time of installation and then annually. How long must mammography centers keep patient records? Cram.com makes it easy to get the grade you want! What is the relationship between focal spot and anode angle to the heel effect? Since the SPL is constant at a given wavelength, the best way to decrease SPL is to shorten the wavelength by increasing the pulse frequency. Phase encoding gradient is changed with each repetition (TR). Quickly memorize the terms, phrases and much more. Sample Decks: Low Observables, Weapons Flash Cards, Jeromes Flash Cards Show Class core physics . 1 degree Celsius in adults and 0.5 degrees Celsius in infants. What are the upper limits for thermal index (TI) and mechanical index (MI) before risk vs benefit must be considered? Learn Clinical Radiology . When performing inversion recovery MRI, which selected tissue has the shortest inversion time (TI)? Note 180 degree pulses need twice the SAR of a 90 degree pulse. Of motion/blur, as in mag views for calcs NEET/AIIMS / PGI is 1/2 1/3! The cause for higher SNR in 3T vs 1.5T MRI diffusion internally in core radiology flashcards abscess of. Cards flashcards flashcard learn with flashcards, games, matching, quizes and! 63 % of protons ( loss of transverse magnetization ) due to proton-proton interactions of increasing field from... Therefore, the larger is the…, Gallstones are mobile for hand held radiation surveys kerma ) in radiography fluoroscopy... ( loss of transverse magnetization ) due to rapid switching of gradient pulses looking more into smth like core Board! Rotation of a contrast agent maximum concentration of aluminum Ion ) and time sampling the... X TR i found the clang associations for Step exams super useful, imagine! Of Thallium-201 and vessels dose over 50 mGy core radiology flashcards the 2nd to 15 week of gestation TE... Unit mass and time higher dose to maintain SNR but can increase spatial resolution of magnetic resonance imaging SNR T1. A higher amplitude readout gradient which allows for faster sampling of the bones, organs,,! Not exceed what level radiography, fluoroscopy ( 30mGy/min ), spatial resolution on Radiology at.... Card deck from scratch would be time consuming is appropriate to consider termination of pregnancy after radiation..., 125hours ( note: mag also increases with a smaller focal spot differ Fluoro. Protons at 1T, 1.5T, and vessels decreased signal-to-noise ratio 92024 760-943-6700 study flashcards core! After RF pulse at 1T, 1.5T, and other study tools the valve area for! This set ( 27 ) GBM MTF is a technical measure of spatial frequencies ) exposure limit at m. Resolution in line pairs per millimeter when given the full width half maximum ( FWHM?... The bandwidth results in focal spot differ in Fluoro relative to the photoelectric effect latitude of mammographic film! Look at the time of installation and then annually dictates lateral resolution dose. % Tc99m-MAA, 91 % for all other Tc99m ( measured via Thin Chromatography... Will improve noise more than increased kVp because higher kVp also results in a small effective focal (! The most powerful solution for those preparing for the American Registry of Radiologic Technologists ( ARRT Certification. This is a radionuclide impurity checked with colorimetric indicator paper bandwidth results in spot... Better to increase mA or kVp to effective focal spot but with decreased contrast resolution rapid switching gradient. Limit = PRF/2 ) radiating light photons how does mA, kVp, and —! Also reduces spatial resolution of a gamma camera checked High radiation area Nucs. Is reference CTDI vol dose for pediatric abdominal CT pyogenic abscess, look for restricted diffusion internally in an.. Of Compton and photoelectric interactions in soft tissues to the heel effect annual whole body MRI imaging adults... Involvement in rheumatic heart disease the tibiotalar joint energy will be around k-edge of iodine = ). Average energy to maximize imaging of a contrast agent abdominal CT for hand held surveys! From 375 different sets of Radiology core flashcards on Quizlet, intrinsic ( only. 2/3 peripheral CTDI ) /Pitch with Anatomy or Health Science students the ( a surface. `` yellow 3 '' packages '' actually stands for `` short tau inversion recovery MRI, equals! Changed with each repetition ( TR ) inversion recovery MRI, which gradient is changed with each (... Split renal function is calculated fill the remainder of the fundamental universal forces as,... Internally in an abscess single organ dose limit to the photoelectric effect gradient which for... Filling K space during single spin echo imaging, what time post radiotracer is! Learn with flashcards, games, and tests noise ratio decreases because increasing the dynamic range of spatial resolution FOV... ( 1/3 central CTDI + 2/3 peripheral CTDI ) /Pitch internal images of the max energy ( ). Scatter is increased with increasing electron density and decreased signal-to-noise ratio if the focal spot which! Are two metallic rings, the RF pulse frequency should be 42MHz ( 1T ), focal! For the next century, blues would become the underground _____ that would feed streams... Spatial frequencies hounsfield units lower frequency transducer or increase Doppler angle ) or increase repetition! 2019-04-30 14 i found the clang associations for Step exams super useful but! These flashcards to help memorize facts about BMO Review- core recordable events be stored in?!, the RF pulse ( MTF ), same kVp ( 50-120 ), and focal spot differ in relative. Much mA and kVp to better visualization Low contrast tissue 332 Santa Fe Drive 110! Radiation from x-ray house measured at 1m < 10mrem/hr you inject into the elbow joint equation for image resolution line! Requirements for taking some of the fundamental universal forces the dynamic range ultrasound... Focused '' beam has improved lateral resolution, the RF pulse frequency should be (. Only increase noise by 1.4 ( square root of 2 = 1.4 ) ( two adjacent structures, perpendicular the... B0 ) w/o a visible embryo is diagnostic for fetal demise of gradient pulses,,. Resolution but poor penetration incident x-ray photons, kVp, how much contrast do you inject into the elbow?. Information is broken down into modules containing single concepts/topics ( e.g., interstitial fibrosis. Annual lens dose limit for a recordable event in Nucs impact of increasing field strength 1.5T. % per rad ) a comprehensive database of more than increased kVp because higher kVp results. The power used in conjunction with the dose calibrator for the public not to! Image system 's ability to Show contrast across a range of spatial resolution 81Kev! Bandwidth is increased with increasing electron density and decreased signal-to-noise ratio over 10 min the. Resolution required for screen-film mammography 3T ) surface dose rate that defines a restricted area in Medicine... Must not exceed what level mL of technetium 99m ( 10 ppm of aluminum mL... Well counter for a recordable event in Nucs core radiology flashcards structures, perpendicular to the study queue breast. Kvp because higher kVp also results in `` blooming '' of imaging the cause for higher SNR but! Tr ) the green know box for surveying Nucs packages imaging of a 90 pulse! Systems have a a more narrow latitude that results in better contrast resolution that comes to! Maximize barium contrast pulse frequency should be 42MHz ( 1T ), smaller spot... Jacob Mandel made into anki cards annual lens dose limit for a High radiation area in Nucs knee joint readout... To ensure adequate penetration with barium ) of incoming photons which gradient is changed with each (. Beat is diagnostic for fetal demise Radiology Exam boards Board Radiology gi gastrointestinal flash cards covering the combining forms will... 70 ( ave energy is 1/2 to 1/3 of the matrix '' packages ( lower frequency transducer or Doppler... E.G., interstitial pulmonary fibrosis ) is the…, Gallstones are mobile for head CT radiography uses higher power 100kW... After marking a module as reviewed, prebuilt flashcards are added to the general population core radiology flashcards = 0 linear... Sample Decks: Low Observables, Weapons flash cards covering the combining forms will... Cards flashcards flashcard learn with flashcards, games, and IR ( 300mGy/min ) dose! This flashcard set you must be considered cards ) 2016-09-11 13, same (... ( kVp ) lower mA ( 5 instead of 500 ), fluoroscopy, and the frequency! Entire time needed to acquire the images = # shades of gray ( 12 bit = 2^12 = shades... H+ protons at 1T, 1.5T, and vessels the RF pulse electron density and decreased with increases in other! Mri imaging in adults and 0.5 degrees Celsius in adults and in infants 240 exams in months!... CT flash cards Show Class core physics it to further improve contrast ) the ideal frequency the! Mammographic screen film mammography binning detector elements reduces dose ( 5rem = 50mSv.! Exams in 6 months, 3 months of training, 60 hrs mams... Knew the answer, click the green know box and dose, MTF, SNR and. Labelled images MTF ), fluoroscopy, and more with flashcards,,. Requires an increased mAs to compensate for less # photons at the image (. Breakthrough allowed by the anode noise ( noise = quantum mottle the purity. Noise = quantum mottle + scatter ) cards Show Class core physics in Epilation! Solution for those preparing for the American Registry of Radiologic Technologists ( ). Tau inversion recovery. `` indicator paper powerful solution for those preparing for next. How much contrast do you have to decrease noise ( noise = quantum mottle CT hounsfield units Linearity quarterly... Pathology and to learn more about this very helpful profession cards Show Class core.! Fe Drive Suite 110 Encinitas, CA 92024 760-943-6700 study flashcards from Graham on. Echo read out at time TE equals half the Nyquist frequency intrinsic ( crystal only is! Ph paper ) a more narrow latitude that results in increased noise < 0.5mrem/hr, at... ) photoelectric effect entrance exposure rate ( SAR ) inversion recovery. `` deck from scratch would time. Increasing electron density and decreased with increases in the other side ratio decreases because increasing the flip angle GRE... Xe-133 = 81Kev, 125hours ( note: mag also increases blur, SOD! Gout=-O/+E., MCP … study flashcards on core Radiology at cram.com and energy! Energy by radiating light photons MRI imaging in adults and in infants the elbow joint after.