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Doctor insights on: What Does An Ultrasound Show That A Ct Cant

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What can a CT scan show that an ultrasound can't show?

What can a CT scan show that an ultrasound can't show?

Better details: The resolution, details shown, on ct is more effective than that of ultrasound. Ultrasound shows liquids e.g. Cysts and effusion better and is cheaper but in obese patients ultrasound has limited penetration. Accordingly, ultrasound, in these patients, is usually replaced by ct that views fatty tissues better and penetrates as deep as needed for better resolution. ...Read more

Dr. Michael Gabor
2,275 Doctors shared insights

Sonogram (Definition)

An ultraound, also known as a sonogram, is a painless and relatively inexpensive imaging test that utilizes sound waves instead of ionizing radiation. There are no side effects. Ultrasound can give us two-dimensional, and in some applications three-dimensional, images of structures and organs in virtually any part of the body. In addition to diagnostic uses, such as evaluating abnormalities in the abdomen, pelvis, and breast, ultrasounds are commonly used to guide needle and catheter placement in a variety of surgical ...Read more


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What happens if neither ultrasound or CT show the gallbladder as the cause of my symptoms?

What happens if neither ultrasound or CT show the gallbladder as the cause of my symptoms?

CCK stimulated: Hida scan can show abnormal function of the gallbladder, even when ultrasound and ct scan do not show gallstones. Consult with your GI specialist, because further testing would depend on your symptoms. ...Read more

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What will a ct/mri or ultrasound (us) show?

What will a ct/mri or ultrasound (us) show?

More info: Each imaging modality can be optimized to help learn more about diseases and help answer questions your for your doctor and you. For example, ultrasound is good at looking at the gallbladder; ct can show bleeding in the brain; MRI can show an acute stroke or find masses in the liver. ...Read more

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Will a hernia definitely show on an ultrasound or a CT with contrast?

Will a hernia definitely show on an ultrasound or a CT with contrast?

Images of the body: Ultrasound, ct, and MRI are three different types of imaging procedures which allow the radiologist see what's going on in your body. Each modality has it's own strengths, weaknesses, and indications. The best use of each is guided by the radiologist. The radiologist interprets at the images and provides a report to your doctor. ...Read more

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Will appendix fecalith shows in ultrasound because the recent showed no previous with CT showed yes?

Will appendix fecalith shows in ultrasound because the recent showed no previous with CT showed yes?

Less sensutive: A ct is like a high definition tv, wide screen. Ultrasound onus equivalent to 13-inch black and white tv with tinfoil on the rabbit ears. Ultrasound can pick up an enlarged appendix and inflammation. Not as sensitive for things like appendicilith a. ...Read more

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Can you still have stones if CT and ultrasound didn't didn't show any in the gallbladder? Mine is functioning at 9%. Is pain the same?

Can you still have stones if CT and ultrasound didn't didn't show any in the gallbladder? Mine is functioning at 9%. Is pain the same?

Biliary Dyskinesia: Ct is not the best study for detecting gallstones. Even an ultrasound, which is the best non-invasive study for detecting gallstones, can sometimes miss stones which are impacted in the neck of the gallbladder. A gallbladder ejection fraction of 9% is abnormal (normal is 35% and greater). It is likely that your symptoms are from gallbladder dysfunction. ...Read more

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My dr thinks my cancer might be back. Going to send me for an ultrasound. Will that show the cancer? I've always had ct's in the past.

My dr thinks my cancer might be back. Going to send me for an ultrasound. Will that show the cancer? I've always had ct's in the past.

May hold true: Recurrent and metastatic disease is common problem with malignancies. When matrix metalloproteinase develops it produces small e-cadherin inducing spread of tumor. Depending on the type of lesion one looks for lung, liver, bone and other areas. The most effective study is the PET/CAT that will demonstrate most sites of spread. For potential therapy. ...Read more

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What can a pelvic CT scan show that an ultrasound doesnt?

What can a pelvic CT scan show that an ultrasound doesnt?

A few things: Better look at bowel, enlarged lymph nodes, areas of infection, and all the bones. Also better characterizes many abnormalities seen on ultrasound. ...Read more

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Few 4mm in right, and few 3mm in left pole of kidneys, shows only on ultrasound and not CT scan? Why?

Few 4mm in right, and few 3mm in left pole of kidneys, shows only on ultrasound and not CT scan? Why?

Cysts: It sounds like you are talking about cysts by the measurements. If you had an ultrasound where cysts were seen, drs usually order a ct scan to confirm. Ultrasound is very sonographer dependent. This is why a more objective test like the ct scan is ordered. Most cysts are considered "incidentalomas" meaning they were found, but are not clinically significant. Hope this helps! ...Read more

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37, CT shows R adnexa clustered cysts or multiseptated cystic lesion. 2.9 x 2.3 x 3.4 cm. No pain. Ct done unrelated reasons-should I get ultrasound?

Obgyn evaluation: Have your obgyn evaluate the CT scan report. They may want to consider a pelvic ultrasound depending on how the CT scan report fits in to your unique individual situation ...Read more

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Does a CT or ultrasound always show kidney stones?

No: Ct and ultrasound does not "always" show kidney stones. The resolution may not be sensitive enough to see very small stones less than 2 to 3 mm. Depending on the thickness of the images on the ct scan, a stone may be potentially missed between the images taken by the ct scanner. Ultrasound may also over-read or miss very small stones as well. Overall though, the detection rate is still very hi. ...Read more

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Would an ovarian cyst show up on a CT or do you need to have an ultrasound?

Would an ovarian cyst show up on a CT or do you need to have an ultrasound?

It would show up if: An ovarian cyst would show up on a ct scan as long as you had a scan of your abdomen and pelvis, and the cyst was large. Very small cysts would not be obvious on ct. Ultrasound is generally considered a better imaging modality for ovarian cysts, because it exposes the patient to less radiation and is a cheaper test. ...Read more

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Ultrasound said I had an loop bowel but CT scan didn't show it up, I'm in content pain please help?

Ultrasound said I had an loop bowel but CT scan didn't show it up, I'm in content pain please help?

I'm not: Sure I understand the question. Did the ultrasound show a hernia that was not seen on CT? Otherwise, an ultrasound report might mention a loop of bowel that technically interferes with the scan, but is otherwise normal and wouldn't be mentioned on a CT report. ...Read more

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Pain on left kidney. Ct scan shows nothing and ultrasound shows mild hydronephrosis. What would cause this?

UPJ stenosis: Ultrasound may detect early obstruction better than ct, and sometime the other way around. It depends. Anyway, left flank pain with mild hydronephrosis, and no stone is usually due to a narrowing of the joint between the ureter (pipe to the bladder) and the renal pelvis (holding area for urine). If there is a mild or partial "blockage" that could explain everything. ...Read more

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Is an bladder ultrasound/ not a CT scan sufficient enough to show if you have bladder stones in your bladder?

Yes: The ultrasound can actually show non-calcified stones that may be more difficult to see on ct. Plus, there is no radiation exposure to your ovaries! ...Read more

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A 9mm hyper vascular lesion showed up on a recent ct scan, but did not show up on my liver ultrasound last fall? Is this normal?

A 9mm hyper vascular lesion showed up on a recent ct scan, but did not show up on my liver ultrasound last fall? Is this normal?

Yes: Some things do not show up on both types of scans. They may choose to repeat the CT san in 6 months to follow the lesion. ...Read more

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I did a pelvic ultrasound, shows a 14x12x9cm RO cyst. Done a CT, shows a 7cm RO cyst and 2 smaller LO cyst. Why the conflict result? Which is accurate

I did a pelvic ultrasound, shows a 14x12x9cm RO cyst. Done a CT, shows a 7cm RO cyst and 2 smaller LO cyst. Why the conflict result? Which is accurate

It doesn't: Seem to make much sense. How much time elapsed between the two tests? If they were done around the same time, the radiologist should look at both of the studies side by side and figure out what the correct measurement is. ...Read more

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Could it be possible a stone to not show up on ultrasound and xray but showed up on CT scan?

Yes: U/s may "see" a dilated ureter, but the echo bounces off the stone. Ct has replaced the intravenouspyelogram (ivp). Blood in urine, microscopic or gross is key. ...Read more

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My hida scan was 35%. The ultrasound shows possible few very tiny gallstones. The CT scan was normal with some intermittent gb symptoms. Should I get the gbremoved?

My hida scan was 35%. The ultrasound shows possible few very tiny gallstones. The CT scan was normal with some intermittent gb symptoms. Should I get the gbremoved?

Tough Call: This is not an uncommon situation--things are not always "black & white". If I were convinced that my patient was having "gallbladder symptoms", I would lean towards recommending surgery. Other pertinent info includes: any tenderness on exam? Did the cck injection reproduce the pain? Are the liver enzymes normal? Is my patient a good candidate for elective surgery? Hope this helps. ...Read more

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Can ct scan and ultrasound miss a hernia? I cant feel a lump but have symptoms like hernia pain.

What kind?: Of hernia are you talking about? Are you meaning a hiatal hernia? I think the idea of an inguinal hernia is what you are after. The CT might not show it if it is not protruding as well as the ultrasound. If you feel no lump and the doc cannot you may have made the wrong dx. See your local surgeon for a second opinion. ...Read more

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Could I have pancreatitis even if mrcp, ultrasound, & CT scan do not show any abnormalities? Lipase normal. Amylase 124 (reference range: 28 to 100).

Could I have pancreatitis even if mrcp, ultrasound, & CT scan do not show any abnormalities? Lipase normal. Amylase 124 (reference range: 28 to 100).

Improbable: Keep monitoring your pancreatic enxymes: you would have to have amylase 3 times normal value Plus medical symtoms of abdominal pain. Gallstones and duodenal problems can also cause transient elevations of amylase and lipase. ...Read more

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Intermittent dully/achy left testicle and lower left abdomen pain. Ultrasounds and CT Scan show nothing. What else could it be?

Intermittent dully/achy left testicle and lower left abdomen pain. Ultrasounds and CT Scan show nothing. What else could it be?

Infection: Could be infection in the testicle, or in the cord, or it could be a varicocele, which is a large varicose vein in the cord.
it is not torsion otherwise the ultrasound will show something.
see a urologist for proper evaluation and treatment. ...Read more

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My wife's ultrasound and CT scan report shows suspected lesion in the urinary bladder. Is there any non surgical method to remove it?

My wife's ultrasound and CT scan report shows suspected lesion in the urinary bladder. Is there any non surgical method to remove it?

Cystoscopy: There is an instrument called a cystoscope that is used to look inside the bladder, take biopsies, and perform procedures. This does not require surgery. Ask your doctor about it. If the lesion is inside the bladder, it's usually the first step. Best of luck! I hope it turns out to be nothing! ...Read more

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It it possible for kidney stones to show up on ultrasound and not of CT scan if so what kind of stones would they be (uric acid)?

Uric acid stones: Yes, this is possible: Uric acid stones are not very radio-opaque - so plain XRAY miss them; so might CT, unless contrast is used. Ultrasound will not miss them, unless small - less than 5 mm ...Read more

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Ultrasound & CT show liver cysts and hemangioma. Could these be the cause of discomfort under rt rib; digesting issues after polyp removal also.

Ultrasound & CT show liver cysts and hemangioma. Could these be the cause of discomfort under rt rib; digesting issues after polyp removal also.

Yes, it could be: Liver cysts and hemangiomas are for the most part, benign, but they can cause several symptoms - most commonly a vague pressure sensation in the right upper quadrant of the abdomen, sometimes radiating to the back. You should see a liver surgical specialist for further consultation. ...Read more

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Would sacral chordoma show up on a ultrasound? Masses in sacral up to 4cm. No mass shows on us or xray. Doc is leaving it at that. Should I ask for ct?

Would sacral chordoma show up on a ultrasound? Masses in sacral up to 4cm. No mass shows on us or xray. Doc is leaving it at that. Should I ask for ct?

I always ask if: Doing a test will change the management of the problem. If the treatment is the same, does this test need to be done? Do you, or does your doctor have any reason to doubt the diagnosis? You are better off asking for a second opinion when in doubt rather than another test. And if the test results won't affect what you do about it then the answer is clearly no. Think about this and discuss w/ MD. ...Read more

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What to do if I have a uterine fibroid that shows up on both an MRI and CT scan, but are not showing up on ultrasounds. Why?

What to do if I have a uterine fibroid that shows up on both an MRI and CT scan, but are not showing up on ultrasounds. Why?

Fibroid: Have your doctor or the radiologist compare all 3 scans and figure out what is going on. The pelvic MRI is probably most reliable in this situation. Sometimes if a fibroid is connected by only a narrow pedicle to the uterus, and it extends away from the uterus, it may be obscured on ultrasound by interposed bowel gas. ...Read more

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If I had a blood clot in my leg, will a CT scan show anything relating to the clot? I had one done today, doc wouldn't do ultrasound.

If I had a blood clot in my leg, will a CT scan show anything relating to the clot? I had one done today, doc wouldn't do ultrasound.

Maybe: But, If and only if IV contrast was administered and the leg was in the scan. Also, There are limitations depending on the machine used and the way the scan was set up. ...Read more

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Ultrasound & CT show liver cysts and hemangioma. Could these be the cause of discomfort under rt rib; digestive issues; all after polyp removal.

Ultrasound & CT show liver cysts and hemangioma. Could these be the cause of discomfort under rt rib; digestive issues; all after polyp removal.

Yes, it could be: Liver cysts and hemangiomas are for the most part, benign, but they can cause several symptoms - most commonly a vague pressure sensation in the right upper quadrant of the abdomen, sometimes radiating to the back. You should see a liver surgical specialist for further consultation. ...Read more

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Lump right side of neck. Ultrasound report rec. CT, CT normal. Valsalva maneuver shows slightly larger IJV on that side. No other symptoms. What next?

See ENT doctor: You must have seen at least one doctor if you have had those tests. As the problem is still there and unresolved, see an ENT specialist for his/her evaluation ...Read more

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Can a CT from 7 years ago be used to diagnosis for current liver hemangioma. A current ultrasound shows a spot on the liver. Don't want to waste money.

CT v US for liver: You stated a ct showed a hepatic hemangioma seven years ago and you had an us showing a "spot" on your liver recently. I will assume you had an ordering physician and can gain access to the old ct report. If so, I would venture to say if they are in the same approximate area and size you're probably fine with just the us. Any major difference may need a reconsideration. Talk with your doctor. ...Read more

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Painful, growing lump on my shoulder blade. Ultrasound, X-ray, MRI, CT show a protrusion of healthy bone. What can it be?

Painful, growing lump on my shoulder blade. Ultrasound, X-ray, MRI, CT show a protrusion of healthy bone. What can it be?

Shoulder lump: Have you been in an accident in the past or broken a bone in that area? Please get a second opinion so that you can be as informed as possible. Peace and good health. ...Read more

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My 15 yr old daughter's CT scan & ultrasound shows a right complex ovarian cyst, septated 6cm. 1st appt Monday seeing Gyn Dr. What is usually done?

To OR to rule out ca: Unfortunately, the only reliable way to tell if her ovarian tumor is benign or malignant is through exploratory surgery, preferably performed by an experienced gyn oncologist who will be prepared to remove the least if the intraoperative findings are benign and who can adequately "stage" her if a cancer is discovered. Seek a consultation and the care from such a gyn ontologic surgeon and team. ...Read more

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I feel 6-7 extrasystols daily. Some during swim or sauna, few in rest. My cardio CT shows healthy heart. Ultrasound showed mitralis prolapsus. I regularly sport. Is this serious? Need medication?

I feel 6-7 extrasystols daily. Some during swim or sauna, few in rest. My cardio CT shows healthy heart. Ultrasound showed mitralis prolapsus. I regularly sport. Is this serious? Need medication?

Palpitations: Palpitations are often benign. Everyone has few extra heart beats and some people feel them. As long as the amount of extra systoles is not high, there's nothing to worry about. ...Read more

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3mm stone show up on ultrasound, then I had a CT scan and it show no stones, so was the ultrasound wrong? Or other blood in urine and pain sti

3mm stone show up on ultrasound, then I had a CT scan and it show no stones, so was the ultrasound wrong? Or other blood in urine and pain sti

Stone: Ct scan is much more sensitive than an ultrasound study for identifying smaller kidney stone. However due to recent concerns raised in the media about the radiation exposure from ct, many practitioners have gone toward using ultrasound as a first line study. Didn't understand the second half of your inquiry. Www. Peedoc. Com @drhtay. ...Read more

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I have a spasam on my upperl left side under brest no pain it affect my sleep I get cat scan ultrasound it shows nothing I need help?

I have a spasam on my upperl left side under brest no pain it affect my sleep I get cat scan ultrasound it shows nothing I need help?

??: I cannot tell by your question whether you have had an ultrasound and cat scan already. Do you have breast implants? Do you have a fever? Do you have breast discharge? Once you have been examined by your primary care physician, if there is concern for something other than fibrocystic disease they will order the appropriate tests. Ultrasound/mammogram would be the starting tests more than likely. ...Read more

Dr. Barbara Lavi
1 Doctor shared a insight

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