EXPERT
Warren Janowitz, MD
Radiologist
Dr. Warren Janowitz is a radiologist practicing in Miami, FL. Dr. Janowitz specializes in diagnosing and treating injuries and diseases using medical imaging techniques such as X-Rays, magnetic resonance imaging and computed tomography exams. These techniques offer accurate visibility to the inside of the patients body and help to detect otherwise hidden illnesses so that they can be treated quickly and efficiently.
52 years
Experience
Warren Janowitz, MD
- Miami, FL
- New York Univ Sch of Med, New York Ny
- Accepting new patients
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Do radiologists do ultrasounds?
Yes, most do. Cardiac US usually done by cardiologists.
Can CT scans cause thyroid problems?
The amount of radiation is minimal and unlikely to cause any damage. Iodide in contrast could conceivably cause short term issues, but unlikely.
Is a CT scan without contrast effective?
Depends on what the CT is for. Some need contrast or will not be diagnostic.
Risk of cancer from CTs?
There is a slight risk of cancer from CTs. There is usually a delay of about 10 years before a cancer develops. Most doctors think the benefits outweigh the risks. I would recommend READ MORE
There is a slight risk of cancer from CTs. There is usually a delay of about 10 years before a cancer develops. Most doctors think the benefits outweigh the risks. I would recommend that you ask your doctors if there is an alternative such as US or MR. If not I would have the CT if it is necessary.
Ultrasound vs CT scan with contrast?
Depends on who is interpreting each study.
Covid and radiology (mammogram)?
No restriction before booster. May be enlarged lymph nodes for some time after booster.
What is the best imaging for kidney stones?
Non-contrast CT is probably most sensitive. Downside is radiation. Ultrasound has no radiation and will detect most stones.
How long after radiation can you be around a pregnant woman?
Unless you are getting injected with or orally taking a radioactive drug there is no need to avoid pregnant women. If you are, you need to check with the physician administrating READ MORE
Unless you are getting injected with or orally taking a radioactive drug there is no need to avoid pregnant women. If you are, you need to check with the physician administrating the drug to find out. Also some radiotherapy procedures involve radioactive implants and also need to to be discussed with your doctor.
Is radiation from the sun dangerous?
Yes. It causes skin cancer.
How long are you radioactive after a PET scan?
Half-life of F-18 is about 2 hours. 8 half-lives, or 16 hours would leave only a minimal amount of radiation.
What happens if you eat sugar before a PET scan?
If your sugar in the blood is too high the PET will be rescheduled since the drug injected s a form of sugar and the scan will not be accurate.
Is there radiation in a PET scan?
Yes. There is radiation from the drug injected and from the CT scan that is used with the PET in most cases. The radiation is low risk for future problems, and the benefit outweighs READ MORE
Yes. There is radiation from the drug injected and from the CT scan that is used with the PET in most cases. The radiation is low risk for future problems, and the benefit outweighs the risk, especially if it is being done for cancer.
Where do you stand during fluoroscopy?
Mostly done remotely. Sometimes need to be in room next to patient.
Does fluoroscopy require contrast?
Oral contrast if it’s for the GI tract (stomach, bowel). Some kidney studies may need contrast.
Can an x-ray show brain swelling?
No. Need CT or MR.
Can you get an MRI or CT scan while pregnant?
MRI is OK. CT can be done if necessary if pelvis is shielded, better after 1 st trimester. If pelvis is scanned risk is low, but not zero. Should discuss risks with radiologist. READ MORE
MRI is OK. CT can be done if necessary if pelvis is shielded, better after 1 st trimester. If pelvis is scanned risk is low, but not zero. Should discuss risks with radiologist.
How much radiation is in an ultrasound?
There is no radiation in ultrasound.
Can a CT scan affect early pregnancy?
Prefer not to do a CT in early pregnancy unless there is a medical necessity. Head and neck and chest CTs would have minimal exposure to the pelvis which can be shielded. Abdominal READ MORE
Prefer not to do a CT in early pregnancy unless there is a medical necessity. Head and neck and chest CTs would have minimal exposure to the pelvis which can be shielded. Abdominal and pelvic CTs would have a higher risk. Risk to fetus is minimal but not zero in the first trimester. An MRI or ultrasound could be a substitute, but not always. If there is a significant medical problem the CT may need to be done. You would probably need to sign a consent if pregnant and could talk to the radiologist about possible risks.
