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SpecialtiesDoctors may have more than one area of specialty interest. Board certification in a specialty area means the doctor has completed formal training and has practice experience in that specialty, and has passed the certification examination from the corresponding accredited medical specialty board.
Doctors may have more than one area of specialty interest. Board certification in a specialty area means the doctor has completed formal training and has practice experience in that specialty, and has passed the certification examination from the corresponding accredited medical specialty board.
Radiology
Languages spoken
English
Doctor Q&A
70 Answers
21 Agrees
The number of answers this doctor has agreed with.
A 42-year-old member asked:
Dr. Ronald Dreifussanswered
Radiology 35 years experience
Your decision: Whether or not to become the care giver for someone with cancer or take time to be with a family member with cancer is a personal decision. There is ... Read More
6k viewsAnswered >2 years ago
A 30-year-old member asked:
Dr. Ronald Dreifussanswered
Radiology 35 years experience
Anoxia and chemo: With this technique a catheter is advanced through the blood vessels directly to the ones feeding the tumor. Chemotherapy mixed with particles is the... Read More
6k viewsReviewed >2 years ago
A 23-year-old member asked:
Dr. Ronald Dreifussanswered
Radiology 35 years experience
Good Care: If you doctor feels you need an ultrasound he is likely following up on a complaint, symptom or lab abnormality during you visit. The test is painles... Read More
6.1k viewsReviewed >2 years ago
A 48-year-old member asked:
Dr. Ronald Dreifussanswered
Radiology 35 years experience
No: Excess blood in the sample may make it harder for the pathologist to identify thyroid cells. A 27 gauge needle (very small) is used to decrease blood... Read More
6.1k viewsReviewed >2 years ago
A 25-year-old female asked:
Dr. Ronald Dreifussanswered
Radiology 35 years experience
Yes: There is always a potential to have a vaginal delivery after c section. Doctors should try not to do C-section unless medically ne essay.
6.1k viewsAnswered >2 years ago
A 28-year-old member asked:
Dr. Ronald Dreifussanswered
Radiology 35 years experience
Not likely: Chest xray will not show one soft tissue structure from another unless it contains calcifications or displaces other structures or normal chest soft t... Read More
6.1k viewsAnswered >2 years ago
A 28-year-old member asked:
Dr. Ronald Dreifussanswered
Radiology 35 years experience
Reporting: The radiologist should make sure the referring doctor is contacted immediately regarding any results that require immediate treatment. Nonurgent find... Read More
6.1k viewsAnswered >2 years ago
A 47-year-old member asked:
Dr. Ronald Dreifussanswered
Radiology 35 years experience
Many things: A "spot on the liver" could be many things. If you have no history of cancer anywhere, the most common things could be a simple cyst (benign fluid) o... Read More
6k viewsReviewed >2 years ago
A 19-year-old member asked:
Dr. Ronald Dreifussanswered
Radiology 35 years experience
Numerous: Many things can cause this. You should see a doctor to take a full history, do a physical exam, potentially order lab work and diagnostic tests. It m... Read More
6.1k viewsAnswered >2 years ago
A 58-year-old member asked:
Dr. Ronald Dreifussanswered
Radiology 35 years experience
Ultrasound: This is an ultrasound examination that evaluates heart motion and heart valve motion during rest and exercise. It is one of several ways to evaluate ... Read More
6.1k viewsReviewed >2 years ago
A 44-year-old member asked:
Dr. Ronald Dreifussanswered
Radiology 35 years experience
No: A routine ct does not cause pain. Even if contrast is given, only a small IV is placed and no pain medicine is necessary. If you have an underlying c... Read More
6k viewsReviewed >2 years ago
A 36-year-old member asked:
Dr. Ronald Dreifussanswered
Radiology 35 years experience
No screening test: Unfortunately there is no screening tests for pancreatic cancer. Ct scan can help identify pancreatic cancers but you would need symptoms first for ... Read More
6k viewsReviewed >2 years ago
A 37-year-old member asked:
Dr. Ronald Dreifussanswered
Radiology 35 years experience
Noninvasive exam: A chest ct is very quick. You are passed through a doughnut shaped machine. They may give you a fluid (contrast dye) through a vein but many chest c... Read More
6k viewsReviewed >2 years ago
A 29-year-old member asked:
Dr. Ronald Dreifussanswered
Radiology 35 years experience
To vague: Would need more history. Your age, sex, race, family history. Any exposures , do you smoke., any symptoms or physical findings etc. Ask again and be... Read More
6k viewsAnswered >2 years ago
A 40-year-old member asked:
Dr. Ronald Dreifussanswered
Radiology 35 years experience
Not uncommon: The overall rate of a collapse of the lung during ct guided lung biospy is estimated at 25 to 30 percent. Many of these will re-expand on their own b... Read More
6k viewsReviewed >2 years ago
A 16-year-old member asked:
Dr. Ronald Dreifussanswered
Radiology 35 years experience
Too vague: The question is too vague. Need more details. Name of disease etc. Are you concerned about infection, primary bone tumors, tumors that have spread to... Read More
6k viewsReviewed >2 years ago
A 34-year-old member asked:
Dr. Ronald Dreifussanswered
Radiology 35 years experience
A small amount: Thyroid biopsies are usually done with a very very fine needle. This makes the biopsy less likely to hurt and actually makes for a better biopsy resu... Read More
6k viewsAnswered >2 years ago
A 34-year-old member asked:
Dr. Ronald Dreifussanswered
Radiology 35 years experience
Invasive examination: A renal angiogram is a minimally invasive examination. The doctor will likely enter the artery located in the right groin initially with a small need... Read More
6.1k viewsReviewed >2 years ago
A 33-year-old member asked:
Dr. Ronald Dreifussanswered
Radiology 35 years experience
Depends: If you are going to have an angiogram performed through a groin vessel the time will depend on the size of the catheter used and whether or not your d... Read More
6.1k viewsReviewed >2 years ago
A 23-year-old member asked:
Dr. Ronald Dreifussanswered
Radiology 35 years experience
Kidneys: The contrast agent is filtered from the body by the kidney. This can take a day or so. Drinking fluids after the exam helps increase the rate of rem... Read More
6.1k viewsReviewed >2 years ago
A 32-year-old member asked:
Dr. Ronald Dreifussanswered
Radiology 35 years experience
Invasive exam: A needle is used to blood vessel in the groin or arm. This is used as access site to other blood vessels with a catheter.
6.1k viewsReviewed >2 years ago
A 38-year-old member asked:
Dr. Ronald Dreifussanswered
Radiology 35 years experience
Low limit: 50, 000 is an abnormal value and the lower limit for which an invasive test can be performed without increased risk of bleeding. At this level the val... Read More
6.1k viewsReviewed >2 years ago
A 27-year-old member asked:
Dr. Ronald Dreifussanswered
Radiology 35 years experience
Possible: The liver is right under the lung separted by the diaphragm. If a lesion is up high in the liver near the edge that runs near the lung it is possible... Read More
6k viewsReviewed >2 years ago
A 31-year-old member asked:
Dr. Ronald Dreifussanswered
Radiology 35 years experience
Tumor spread: Cancers can spread to different areas in the body. It is not uncommon for lung cancer to spread beyond the lung to other areas such as the liver and ... Read More
6k viewsAnswered >2 years ago
A 41-year-old member asked:
Dr. Ronald Dreifussanswered
Radiology 35 years experience
Blood vessels: The physician is injecting a liquid contrast agent into the blood vessel to look at the interior structure to look for areas of narrowing or blockage ... Read More
6.1k viewsReviewed >2 years ago
A 39-year-old member asked:
Dr. Ronald Dreifussanswered
Radiology 35 years experience
Details: Ct is an noninvasive exam. Angiogram requires needle placement into a blood vessel. Would need to know what is being evaluated and whether a noninva... Read More
6.1k viewsReviewed >2 years ago
A 24-year-old member asked:
Dr. Ronald Dreifussanswered
Radiology 35 years experience
Yes: 50000 is an abnormally low level but is still high enough not to significantly increase bleed risks. But this is the lowest level where most would co... Read More
6.1k viewsAnswered >2 years ago
A 37-year-old member asked:
Dr. Ronald Dreifussanswered
Radiology 35 years experience
No: The need for a C-section will depend on multiple factors.
6.1k viewsAnswered >2 years ago
A 21-year-old female asked:
Dr. Ronald Dreifussanswered
Radiology 35 years experience
Depends: If it is of the lower legs you may feel some mid discomfort in the legs as the contrast is going through the blood vessels. In the pelvis you may fee... Read More
5.9k viewsReviewed >2 years ago
A 33-year-old member asked:
Dr. Ronald Dreifussanswered
Radiology 35 years experience
Too vague: The question is too general. Without additional information and a physical exam it is impossible to say. If you are concerned a visit to a physician... Read More
5.9k viewsReviewed >2 years ago
A 32-year-old member asked:
Dr. Ronald Dreifussanswered
Radiology 35 years experience
Web search: American cancer society
american medical association
contact your local hospitals and local cancer centers
memorial sloan kettering cancer center i... Read More
6k viewsAnswered >2 years ago
A 32-year-old member asked:
Dr. Ronald Dreifussanswered
Radiology 35 years experience
No need to: A cyst is completely benign and do not need to be drained. If it is causing you pain or discomfort you can ask to have it drained. Placing a needle ... Read More
6k viewsReviewed >2 years ago
A 45-year-old member asked:
Dr. Ronald Dreifussanswered
Radiology 35 years experience
Yes: The ultrasound will typically be performed by a radiologist or perhaps by the urologist.
6.1k viewsReviewed >2 years ago
A 29-year-old male asked:
Dr. Ronald Dreifussanswered
Radiology 35 years experience
No: There is nothing wrong with this activity.
6.1k viewsReviewed >2 years ago
A 42-year-old member asked:
Dr. Ronald Dreifussanswered
Radiology 35 years experience
Stone in bile duct: It is a stone in the tube that carries bile from the liver and gallbladder into the small bowel. If a stone blocks the tube it can lead to infection, ... Read More
6k viewsReviewed >2 years ago
A 69-year-old member asked:
Dr. Ronald Dreifussanswered
Radiology 35 years experience
Temporary: The decreased libido side effect is reversible several monts after you discontinue the drug.
6.1k viewsReviewed >2 years ago
A 30-year-old member asked:
Dr. Ronald Dreifussanswered
Radiology 35 years experience
Follow up: You need to get detailed information from your doctor regarding the test, the abnormality, and what further investigation if any is expected.
6.1k viewsAnswered >2 years ago
A 24-year-old member asked:
Dr. Ronald Dreifussanswered
Radiology 35 years experience
Yes: The specialist to see for potential thyroid issues is an endocrinologist.
6.1k viewsAnswered >2 years ago
A 37-year-old member asked:
Dr. Ronald Dreifussanswered
Radiology 35 years experience
Dont drink: Alcohol has been linked to birth defects. To eliminate all risk from alcohol don't drink during pregnancy.
6.1k viewsReviewed >2 years ago
A 54-year-old member asked:
Dr. Ronald Dreifussanswered
Radiology 35 years experience
Number: There is no limit on the number of ct scans you can have. If you need the imaging studies they should be performed. However, all physicians should t... Read More
6.1k viewsReviewed >2 years ago
A 40-year-old member asked:
Dr. Ronald Dreifussanswered
Radiology 35 years experience
CT: The exam is very rapid, less than a minute, with limited radiation and high diagnostic yield. The machine is doughnut shaped and does not usually bot... Read More
6.1k viewsReviewed >2 years ago
A member asked:
Dr. Ronald Dreifussanswered
Radiology 35 years experience
Hospital or office: Scrotal ultrasound is a common test and easily done by a trained ultrasound technologist and interpreted by a radiologist. It is painless and uses so... Read More
6k viewsReviewed >2 years ago
A 71-year-old member asked:
Dr. Ronald Dreifussanswered
Radiology 35 years experience
Nuclear Medicine: In a bone scan you are injected with a radioaactive isotope.
6.1k viewsAnswered >2 years ago
A 32-year-old member asked:
Dr. Ronald Dreifussanswered
Radiology 35 years experience
Need testing: Blood in the urine can be from several causes one of which is bladder cancer. Bllod in the urine is definitely abnormal and should be evaluated right... Read More
6k viewsAnswered >2 years ago
A 31-year-old member asked:
Dr. Ronald Dreifussanswered
Radiology 35 years experience
Yes: C sections should be performed if clinically indicated. Diabetes is not a contraindication.
6.1k viewsReviewed >2 years ago
A 41-year-old member asked:
Dr. Ronald Dreifussanswered
Radiology 35 years experience
Nausea: Iodinated contrast can cause nause. Since you are done lying down, if you vomit you are at greater risk for having particles go into the airway. In ... Read More
6.1k viewsReviewed >2 years ago
A 24-year-old member asked:
Dr. Ronald Dreifussanswered
Radiology 35 years experience
No: An angiogram is a minimally invasive examination of the blood vessesl used to make a diagnosis or treat a problem diagnosed by prior noninvasive studi... Read More
6.1k viewsReviewed >2 years ago
A 27-year-old member asked:
Dr. Ronald Dreifussanswered
Radiology 35 years experience
Femoral: The common femoral artery (groin vessel) is the most common. If this can't be used radial or upper arm (brachial ) can be used.
6.1k viewsAnswered >2 years ago
A 29-year-old member asked:
Dr. Ronald Dreifussanswered
Radiology 35 years experience
Variiable: It all depends on which vessels and the problems detected. Some vessels can be difficult to enter.
6.1k viewsReviewed >2 years ago
A 39-year-old member asked:
Dr. Ronald Dreifussanswered
Radiology 35 years experience
Depends: The radiation exposure depends on the technique used andthe time the radiation bead is actually on. The radiation time is recorded during angiograms ... Read More
6.1k viewsAnswered >2 years ago
90,000 U.S. doctors in 147 specialties are here to answer your questions, provide medical advice, write prescriptions, and more.
TestimonialsRecommendations and Thank you notes are endorsements given from patients or other doctors.
Recommendations and Thank you notes are endorsements given from patients or other doctors.
2
Recommendations
168
Thank you notes
HealthTap member
Mar 30, 2015
Dr. Dreifuss is an amazing doctor! #nationaldoctorsday2015 #virtualflower1
HealthTap member
Mar 31, 2015
Dr. Dreifuss is an amazing doctor! #nationaldoctorsday2015 #virtualflower1
HealthTap member
In poor renal function how does physician use the co2 gas?
HealthTap member
Thank you, your answer was very helpful!
HealthTap member
Thank you, your answer was very helpful!
Education & Training
Medical/Graduate school
Mount Sinai School of Medicine, NY
Graduated 1987MD
Residency
Mount SinaI MEDICAL CENTER
Awards
HealthTap Founding Doctor
HealthTap ClubMD
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