Questions tagged [radiology]
Radiology is a medical specialty that uses imaging to diagnose and treat diseases seen within the body.
34 questions
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What actually is a stress fracture and why do they not necessarily appear on X-ray but do on MRI?
I'm a runner who was recently diagnosed with a stress fracture in my tibia. As dumb as it may sound, I can't seem to get my head wrapped around what a stress fracture actually is. Is it a hairline ...
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What is Contrast in Medical Imaging
The term contrast gets thrown around alot but I always have a hard time understanding it. Can some please explain it to me. What is contrast in general when it refers to medical imaging? Second how ...
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T1 weighting vs T2 weighting for monitoring a brainstem lession
https://www.researchgate.net/figure/1-Typical-values-of-relaxation-parameters-T1-and-T2-ms-for-Hydrogen-components-of_tbl1_291346848
I see from the table (various tables actually from diverse papers ...
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How do we differentiate the truncus coeliacus from the superior mesenteric artery?
How do we differentiate the the truncus coeliacus from the superior mesenteric artery when looked at from an MRI in the axial plane? For example, the images that I attached, how can I differentiate 8 ...
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Are the Tesla values of an MRI only related to the external static magnetic field?
Does a 3T MRI have 3 Tesla as magnetic field strength related to the external superconducting constant magnetic field or does it also include the maximum magnetic field strength at the position where ...
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Would the anode heel effect happen in an un-angled anode?
If the anode of the x-ray machine had a uniform rectangular shape that was directly facing the cathode (not angled), wouldn't there still be a heel effect? I think that the intensity of the x-ray ...
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Can radiography procedures in medicine use gamma radiation?
Can radiography with gamma rays be used in medicine? If not, why not?
Is it a technical issue (gamma rays are not easy to generate or detect for this purpose) or is it a safety issue (gamma rays are ...
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Is there a name for color coding B-Mode ultrasound?
Recently i saw an ultrasound device which instead of displaying the image on a grayscale displayed the image on a color gradient scale from yellow (on the bright end) over red towards black (on the ...
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5 events of reoxygenation (in tumour cells)
I was asked this question in a seminar ,while I have understood the basic process ,I could not find specific mention of any such "events" in the books I referred to(Perez and Brady;Hall) or ...
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Does this paper report miscalculated metrics?
During a literature search I stumbled upon this paper, which evaluated the diagnostic accuracy of ultrasonography for the detection of gallstones (compared to the gold standard cholecystectomy).
Their ...
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Distinguishing gallbladder polyps vs gallbladder cancer on ultrasound
"On ultrasound a gallbladder polyp is seen as an elevation of the gallbladder wall that protrudes into the lumen. (...) A clearly infiltrating or large mass should be treated as a gallbladder ...
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What are typical entrance skin dose rates in radiography?
I am designing a radiation dosimeter, and I am trying to work out if it can detect the radiation rate/dose used in radiography procedures (with dosimeter placed on the patients body). I want to start ...
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What is the additional diagnostic benefit of an intravenous contrast agent when examining the urinary system with CT?
I read an overview of urinary calculi imaging, but the text was not clear as to the benefits vs risks of using a contrast agent to support CT imaging. The text did discuss use of a contrast agent ...
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Where can I find free cervical MRI files and cervical CT angiography files?
I would like to research cervical MRI and CT-angiography files of different people to understand more about cervical MRI and CT-angiography.
I've only been able to find some other MRIs and CTs here: ...
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Does a radiologist adjust the amount of radiation for each individual?
When performing an x-ray (in the UK specifically) does a radiologist use different settings based on which body part they are x-raying? Or do they have the machine on one setting for everyone? I'm ...
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