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Doctor insights on: Ct Scans Without Contrast Vs Contrast

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29 year old female 2 head CT scans without contrast within 2 months of one another. What is my cancer risk? I have read "small" or "negligible"

29 year old female 2 head CT scans without contrast within 2 months of one another. What is my cancer risk? I have read "small" or "negligible"

Negligible: Two CT scans will not raise your risk to a measurable level, above your background risk.
For good health - Have a diet rich in fresh vegetables, fruits, whole grains, milk and milk products, nuts, beans, legumes, lentils and small amounts of lean meats. Avoid saturated fats. Drink enough water daily, so that your urine is mostly colorless. Exercise at least 150 minutes/week and increase the intensity of exercise gradually. Do not use tobacco, alcohol, weed or street drugs in any form.
Practice safe sex, if you have sex. ...Read more

Dr. Sandra Lora Cremers
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Computed Tomography (Definition)

Ct uses xrays taken an 360 degrees combined with a computer to see"inside" the body. The table moves as the xray tube and detectors spin around the patient 10 times a second or more! The image shows excellent soft tissue detail, enhanced with injection of intravenous contrast or oral contrast. This way the body is shown in slices, in any plane, usually axially, but ...Read more


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Can you tell me how oral contrast taste for CT scans?

Can you tell me how oral contrast taste for CT scans?

Depends on the type: Oral contrast can be water, a barium based contrast, or iodine based contrast. It can taste like water, thick and bland, or like an herb. ...Read more

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Can you tell me how could oral contrast taste for CT scans?

Can you tell me how could oral contrast taste for CT scans?

Oral contrast: There are different oral contrasts, and there are different things to mix them with, so that is a difficult question to answer. Most people don't find it too bad. In the interests of full disclosure, however, in my experience no one has ever asked for more. :) ...Read more

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Do CT scans show appendicitis without using contrast fluid?

Do CT scans show appendicitis without using contrast fluid?

Less accurate: While there is controversy about the liberal use of ct scans for the diagnosis of appendicits, it does increase accuracy of diagnosis. There are several parameters on ct scan that are used to diagnose or exclude appendicitis: visualization of the appendix, free fluid around the appendix, blurred fat or fat stranding around the base of the appendix and free air in the area of the appendix. ...Read more

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Will the CT contrast from multiple CT scans start to affect my kidneys?

No.: The nephrotoxic effect of contrast is dose related, and does not accumulate over time. Multiple CTs would only make a difference if you had them within a very short time frame, for example if you had several contrast enhanced scans on the same day or over the course of a few days. ...Read more

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Can 2 CT scans with contrasr miss anything wrong in the GI tract?

Yes: There can be structural, infectious and metabolic problems within the intestine and liver that are missed by ct scans. Blood work, physical examination, dietary changes, and stool cultures will determine if direct visualization by scope is necessary. ...Read more

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I had a cat scan with contrast on abdamon. If I had lymphoma would the CT scan have picked it up in my body?

I had a cat scan with contrast on abdamon. If I had lymphoma would the CT scan have picked it up in my body?

Maybe: If advanced lymphoma were present in the area of ct scan (abdomen), then yes. However, lymphoma could be in neck, chest, etc and be undetected. Sometimes lymphoma is primarily in the bone marrow with very little observable enlarged lymph nodes. ...Read more

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I had a cat scan with contrast on abdamon. If I had lymphoma would the CT scan have picked it up in my body?

I had a cat scan with contrast on abdamon. If I had lymphoma would the CT scan have picked it up in my body?

Yes and no: A ct scan of your abdomen should pick up a lymphoma unless: 1) the lymphoma is so small that it has not yet caused the lymph node to enlarge, or 2) the lymphoma is elsewhere (chest, groin, neck, etc.) and the abdominal ct scan was a study in the wrong part of the body. ...Read more

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Is it possible to become allergic to the iodine contrast used for CT scans if I continuously have them? Does frequency matter?

Iodine sensitivity: Yes it is possible. If you every think you do have a reaction, you should report it immediately and not get the iodine dye again. ...Read more

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Do ct scans with no contrast always miss tumors in the cerebellum?

Do ct scans with no contrast always miss tumors in the cerebellum?

Not always: Brain CT scans without contrast do not always miss cerebellar tumors. A tumor whose density is different from that of its adjacent brain tissue, or whose size is such that it pushes away adjacent brain tissue (distorting the normal shapes and outlines) will likely be visible even on noncontrast scans. ...Read more

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I've gotten a few scans this year. 3 CT scans and 3 mri, one with contrast. Can I have cancer because of it?

I've gotten a few scans this year. 3 CT scans and 3 mri, one with contrast. Can I have cancer because of it?

Extremely unlikely: So unlikely that the likelihood approaches zero. You have more radiation exposure on a cross country flight, or hiking at altitude. That said, WHY did you have all those scans? If you have had unintentional weight loss, night sweats, or other unexplained pain, the scans may be looking for cancer. But the risk of cancer due to the scans is nearly zero. Why did you have them? ...Read more

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I've had CT scans with contrast several times with no reaction but the last time I broke out in hives and had nausea. Why would that be?

Minor contrast: Reaction. These are not a conventional allergic reaction in that the symptoms may never happen again or may occur sporadically (though one episode increases your chances of having another one). You are not precluded from having contrast again but may want to be premedicated with Benadryl (diphenhydramine) /steroids next time to decrease the chance of this happening again. This is easy to do with a few pills. ...Read more

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I've had 3 CT scans with iodine contrast (my third one I had today) & multiple MRI's with contrast. Will this damage my kidneys?

I've had 3 CT scans with iodine contrast (my third one I had today) & multiple MRI's with contrast. Will this damage my kidneys?

Contrast OK but CT: Exposure might be a little too much. Each time you get contrast, your kidneys will easily excrete it. As long as the doses are separated by a day or more, it won't hurt your kidneys. At only 19, you should talk to your doctor about ways to reduce the number of CTs to limit the ionizing radiation. MRIs and Ultrasounds have no ionizing radiation and are considered low risk for future cancer. ...Read more

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Can you have symptomatic colon cancer for five years without showing on ct scans (oral no iv contrast)? Have had five ct in past 5 years

Can you have symptomatic colon cancer for five years without showing on ct scans (oral no iv contrast)? Have had five ct in past 5 years

Colon CA CT on show?: 41 F Asks: Can you have symptomatic colon cancer for five years without showing on ct scans (oral no iv contrast)? Have had five ct in past 5 years. ANS: CT not so good for colon cancer detection. What are symptoms for 5 years? This would be unusual as colon CA usually does not cause symptoms other than bleeding or obstruction. Unless it is also in liver now. That should show up on CT eventually. ...Read more

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I have a history of many allergies causing hives. I've had CT scans with no problem to contrast. Getting another one, should I take any precaution?

I have a history of many allergies causing hives. I've had CT scans with no problem to contrast. Getting another one, should I take any precaution?

No: There is no reason to be overly concerned since your risk of having a reaction to the contrast material is no higher than the average person despite your allergies. The contrast material reaction is not a true allergic reaction. ...Read more

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Symptoms of colon caner (blood, change in habits, pain) for five years, 5 CT scans (with oral / not iv contrast) clear? Cancer still likely? Scope Feb

Symptoms of colon caner (blood, change in habits, pain) for five years, 5 CT scans (with oral / not iv contrast) clear? Cancer still likely? Scope Feb

Not Ca: Blood and changes in bowel habit may be early signs of colon Ca but if not progressive and when scans and a 5 year interval pass and there is no signs of metastatic tumor then we are dealing with an inflammatory bowel process that should have been identified by colonoscopy and bx. ...Read more

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I just had a hysterectomy and a bladder sling put in 10 days ago. Today it was discovered after some contrast CT Scans that I was very constipated wh?

I just had a hysterectomy and a bladder sling put in 10 days ago. Today it was discovered after some contrast CT Scans that I was very constipated wh?

Postop constipation: Constipation is a very common side effect after surgery. Anesthesia slows the intestinal function and pain medications do too. Miralax, stool softeners and milf of magnesia can be very helpful to relieve constipation ...Read more

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How do non contrast CT scans detect strokes? I was wondering how non contrast CT scans help diagnose strokes, since the non contrast would means that the parts of the brain with and without blood would all look the same, right?

How do non contrast CT scans detect strokes? I was wondering how non contrast CT scans help diagnose strokes, since the non contrast would means that the parts of the brain with and without blood would all look the same, right?

A screening test: The earliest sign of a stoke on a ct scan is edema or swelling of the part of the brain that had the stroke. It may take several hours for this to show up on a ct scan, but ct scans are widely available 24/7, while MRI may not be. Ct can will show if the stroke is hemorrhagic, which will mean that treating the stroke with tpa (alteplase) is contraindicated. ...Read more

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