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How much radiation exposure with CT scan with contrast

A 55-year-old male asked:
Dr. Saptarshi Bandyopadhyay
20 years experience in Hospital-based practice
Can't undo damage.: There are 2 biological effects of radiation: the 1st is random DNA damage - any stray radiation can permanently alter DNA & cause a mutation (canc ... Read More

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A 55-year-old male asked:
Dr. Gurmukh Singh
48 years experience in Pathology
Minimal: Any radiation has a risk of inducing cancer. The need for CT has be balanced against the minor risk of cancer from radiation for CT.
A 36-year-old female asked:
Dr. Gary Sandler
53 years experience in Dentistry
CBCT Scan: See the following website for some basic information. It depends upon particular brand of unit, software, and extent of area scanned. The office actu ... Read More
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A 46-year-old male asked:
Dr. Michael Gabor
32 years experience in Diagnostic Radiology
Radiation dose: from Barium Swallow averages about 6mSv. The theoretical(and it is only theoretical) increased cancer risk from this amount of radiation is 0.03% ove ... Read More
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A 47-year-old member asked:
Dr. David Earle
30 years experience in General Surgery
Yes: However, there are techniques to reduce radiation exposure. Also, make sure you ask the reason for both scans, as many times there is no clinical need ... Read More
A 40-year-old member asked:
Dr. Loren Lewis
33 years experience in Occupational Medicine
Depends on scanner: This will vary with the scanner, somewhat. I found an assessment/estimate of this with a google search and i really can't do better than this. You w ... Read More
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A 67-year-old female asked:
Dr. Matthew Solhjem
20 years experience in Radiation Oncology
CT.: Iodine contrast highlights the vessels on ct (arteries/veins) so it is easier to detect lymph nodes or other tumors. Barium highlights the stomach, s ... Read More
A 34-year-old female asked:
Dr. Michael McGonigal
38 years experience in General Surgery
Not double: Pet scan delivers radiation from a radioactive injection given before the test. It fades very quickly. Ct scan delivers beams of xrays. In general, th ... Read More
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A 55-year-old male asked:
Dr. Michael Gabor
32 years experience in Diagnostic Radiology
It depends: on the technical parameters of the scans, particularly the CT scan. The exposure from the CT scan could potentially be more, about the same, or lass t ... Read More
A 42-year-old member asked:
Dr. David Kornguth
19 years experience in Radiation Oncology
It is very accurate: Ct scans are the best way to detect early lung cancers. No test is perfect but cancers slightly smaller than 1cm can be found.
A 24-year-old male asked:
Dr. Creighton Wright
55 years experience in General Surgery
It may: But at young age, good hydration, and some separation if timing of cts the risk is limited. Diabetes, some medications, preexisting renal disorders a ... Read More
A 45-year-old male asked:
Dr. Brian Wosnitzer
17 years experience in Nuclear Medicine
Depends..: It depends on what type of nuclear study you are having done. There are many different radiotracers and each has a different half life and different ... Read More
A 50-year-old member asked:
Dr. Louis Grenzer
54 years experience in Cardiology
18 mSv: For comparison, a chest x-ray is 0.02 msv and and abdominal ct scan would be 10 msv. So the thallium scan is like getting almost a thousand one view c ... Read More
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A 46-year-old member asked:
Dr. Alfred Parkhill Hand
20 years experience in Radiology
Bowel: Oral contrast will help in evaluating the bowel.
A member asked:
Dr. Michael Zevitz
36 years experience in Internal medicine
Very small amount: However, a coronary calcium scan should only be done in the presence of intermediate or high risk of having coronary artery disease, Asymptomatic indi ... Read More
A 45-year-old member asked:
Dr. Steven Chmielewski
29 years experience in Diagnostic Radiology
Radiation therapy!: Although there is much concern about radiation exposure in diagnostic imaging, the doses received by a ct exam are miniscule compared with the doses o ... Read More
A 62-year-old male asked:
Dr. John Thaler
40 years experience in Prosthodontics
Depends: Many surgeons work from panoramic and PA single images with great success, precision and safety. However, for more complex applications around the sin ... Read More
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A member asked:
Dr. Christine Hom
29 years experience in Pediatrics
CT scans: If there is an alternative to imaging the area such as MRI, then we prefer MRIs. There are some studies looking for bony problems that CT scan works ... Read More
A 39-year-old female asked:
Dr. Anroy Ottley
18 years experience in General Surgery
Not the best choice.: It can detect advanced stage cancer but it is not ideal. A colonoscopy would be a much better choice.
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A 24-year-old male asked:
Dr. John To
Dr. John To answered
29 years experience in Radiology
Both: The actual diagnosis of lymphoma requires tissue, usually excisional biopsy of an entire lymph node. Staging to see where other sites of disease coul ... Read More
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A 36-year-old male asked:
Dr. Holly Maes
35 years experience in Pediatrics
Yes, no: There is some evidence that chest ct could put one at higher risk for thyroid cancer - but almost all of these suggest that it is dose dependent and t ... Read More
A 41-year-old male asked:
Dr. Mark Kuhnke
39 years experience in General Surgery
Why worry: In answer to your question, i don't believe an MRI has any advantage over ct for pancreas lesions. You've had a normal u/s and a normal ct, so why ar ... Read More
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A 37-year-old member asked:
Dr. Addagada Rao
55 years experience in General Surgery
Yes: Radio active isotopes used in medical diagnostic tests will emit very small minute amount of radiation, and rapidly disintegrates, yes you can have a ... Read More
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