Questions tagged [radiology]

Radiology is a medical specialty that uses imaging to diagnose and treat diseases seen within the body.

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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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Method for Intravascular Perfusion Parameters in Dynamic Contrast-Enhanced CT

I want to create perfusion metric maps of the pulmonary vascular tree, but, in literature, it isn‘t clear to me which is the „state-of-the-art“ method for this. My target metrics are blood flow, blood ...
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How to start to learn radiology as an mri physicist

I am an mri physicist. I am aleays looking at brain, abdomen, prostate scans etc. At this point, I want to understand what am I looking at, how to detecr anomalies etc. I know it is a long way and I ...
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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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1 answer
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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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Radiological Phantom Studies - Sampling with no People

I am writing a critical appraisal regarding a radiological study using an anthropomorphic imaging phantom. The phantom is constructed of materials that mimic human tissue but negate the need to ...
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Does the Sievert unit account for how concentrated the radiation dose was?

I often see different types of medical imaging effective doses compared to time required for an equivalent effective dose from background radiation. For example, a dental x-ray is compared here: ... ...
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What study design is used in this research?

https://www.sciencedirect.com/science/article/abs/pii/S1939865415001113 I've learned about many types of study design including experimental (randomised control trials etc.) and observational study ...
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What is the meaning of "group-by-region interaction effects" (PET scan study of brains affected by schizophrenia)?

I was reading a recent study on schizophrenia and came across this sentence: We found significant group and group-by-region interaction effects on volume of distribution (VT). What is the ...
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How safe is low frequency radiation in I.T. edge cases? (5G, etc)

Closely Related: 5G Radiation Dangerous? Being inundated with all kinds of 5G health statements, (for & against), I noticed a weird trend - the absence of cumulative radiation studies. Question: ...
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DICOM SliceThickness proximity

I do have DICOMs (Digital Images and COmmunications in Medicine) from several CT volumes where most volumes miss the SliceThickness and SliceLocation attribute. Is there another attribute usually ...
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Why don't we actively strugle to provide the highest LET particle radiation therapy, maybe with manganese, fluorine, nitrogen, iron, or osmium?

https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3885128/ I am a cancer patient since 16, a medical student aiming for radiation oncology and subsidiary MSc&Phd in radiophysics. I am actually ...
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Information on the FLUENTAL ® moderator/ shifter. How and who made it?

The FLUENTAL® moderator/shifter appears often in the literature surrounding BNCT therapy. Google offers no search results with useful information on how it was made and whom by.
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Why is the Doppler angle setting supposed to be 60 degrees for arteries but 0 degrees for veins? [closed]

In ultrasonography, why isn't the Doppler angle correction supposed to be 60 degrees for veins just like it is for arteries?
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Does only the cumulative dose and not the dose rate matter for health effects of low-level radiation?

Most web articles related to negative health effects of radiation and radiation exposures from various sources (diagnostic scans, natural background radiation etc.) compare risk levels in terms of the ...
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How does cancer radiotherapy target only cancer cells? [closed]

I read about cancer treatment where the patient would be given radiation to kill cancer cells. How do they make sure that it affects mostly the cancer cells? Moreover how do they manage it so that it ...
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Typical size for breast tumor at the beginning and at the end of radiotherapy treatment

I'd like to know if you know about sizes of breast tumors at the beginning and at the end of a typical radiotherapy treatment. I know that standard scheduled (50 Gy in 25 sessions) and ...
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1 vote
3 answers
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What to do when an earthquake hits while inside a MRI?

As mentioned earlier, I had a MRI today... I wasn't in the waiting room for long so I didn't have a chance to read the bright yellow folder labeled "Earthquake Guide during a MRI." But as I walked ...
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2 votes
1 answer
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is RADIO-SIGNAL Jammer safe for health?

Recently, I had to overview some WiFi technologies, and then wanted to check RADIOSIGNAL-BLOCKER hardware (a.k.a. WiFi/Cellural-Signal/Bluetooth/ Jammer). We needed to use that technology to block ...
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Ultra Sound Gender Prediction Accuray

Sorry for a very basic Question (as I am a software engineer) but I am confused after getting material from internet about accuracy of Ultra Sound Gender prediction Question: How much this is likely ...
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1 answer
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Could hairline fractures be obscured by x-ray images

I had fractured my ankle by the fracture of the fourth metatarsal was not seen in two X-rays that were taken. Only CT-scan revealed the cracks. Why is this the case? I was seen by an doctor who ...
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3 votes
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Are 3D-DSA and 3DRA the same?

This question is to radiologists. I'm a PhD student in medical image processing and (I thought that) I was working with 3D-DSA images obtained by subtraction of non-contrast enhanced CBCT from a ...
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5 votes
1 answer
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How do I get screened for (ovarian) cancer?

My wife faces infertility issues, and per a report on NBC news (http://www.nbcnews.com/health/cancer/can-infertility-point-ovarian-cancer-risk-n447901) she potentially faces a higher cancer risk for ...
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8 votes
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Effects of X-rays on the human body

What is the maximum number of times a person can safely undergo x-ray scanning? If this limit is exceeded, are there serious and/or life threatening side effects that the person may experience?
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