Who developed the first CT (computed tomography) unit? What did doctors use before then?

EMI. The Beatles company, Electronic Musical Instrument Co, EMI, produced the first CT scanner. Wikipedia has a great discussion of the history: http://en.wikipedia.org/wiki/X-ray_computed_tomography I was trained before CT was in use. We had to rely on our wits and some much more invasive tests.

Related Questions

Does it hurt to get a computed tomography done?

No. It is a pain free procedure, if you are claustrophobic discuss this with your doctor. Read more...
No. Not at all except if IV needs placed in your vein for contrast. Read more...
Essentially no. A ct exam itself does not cause pain. If the exam is ordered with intravenous contrast, you will need an IV placed. Some people can feel the contrast as it is injected, but this is not painful. If the contrast gets escapes the IV line (an extravasation), there is the potential for pain as the contrast builds up in the soft tissues. If this occurs, you need to alert the tech performing the exam. Read more...

Will I get any medicine for pain when I go for the computed tomography?

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 condition that causes pain and limits your ability to lay on your back you may need to talk to the doctor requesting the exam to see if you should take medicine prior to the exam. Read more...

How common is it for someone to need a helical computed tomography?

Very Common Test. 'helical computed tomography' -- a cat scan -- is an immensely valuable test for evaluating diseases of every part of the body. Scanners are widely available, both in hospitals and in outpatient centers, and the images obtained provide valuable insight into many diseases. Read more...

What is the definition or description of: computed tomography angiogram cta?

Artery test. A special type of ct scan where intravenous dye is injected, and imaging is timed so that the arteries of interest are maximally opacified by the injected dye. Ct images in this test are acquired rapidly, and the actual scan will likely be done in a matter of seconds. Historically, evaluating the arteries required threading a catheter into the artery of interest. Cta is non-invasive. Read more...
Cta. Cta is a method by which using high resolution cat scans one can image various arterial beds either coronary or peripheral vasculature it used radiation and dye. Read more...

Computed tomography test for chest pain?

It's helpful at time. There are a variety of chest pain conditions that may be diagnosed on ct scan. From simple pleural effusions to aortic dissection. Ct scans for chest pain is a very common test. Read more...
ChestCT. Done in many emergency rooms as a way to look for pulmonary embolism, dissection of aorta, sometimes coronary artery blockage if contrast is used with specific protocols. Read more...

Is computed tomography angiogram cta a very common procedure?

CT angiogram. It is being done much more often when it is necessary to visualize blood vessels (for example to see if there's a blockage). There is some radiation involved but it is considered much less "invasive" and has less complications than the regular type of "angiogram", where blood vessels are visualized by inserting thin tubes called catheters directly into them to inject a dye. Read more...
Yes. Many done every day. Saves you from getting a diagnostic angiogram to diagnose your problem. Read more...
Yes. Many doctors will order this test first before a more invasive test such as a routine angiogram where a catheter is inserted into the blood vessel. Because this is a ct picture it may be unclear or llimited. If the results are unclear or show a problem you may get a routine angiogram to confirm any problems and perhaps get treatment at the same time. Read more...

What is the use of spect (single-photon emission computed tomography) in nuclear medicine?

3D imaging. Spect is a technique that allows 3d imaging of nuclear medicine scans, giving better spatial resolution (ie, smaller things can be seen and identified). Read more...
Better resolution. Spect technology allows the radiologist to see abnormal findings more accurately. Read more...
Multiple . Spect is a modality of nuclear medicine imaging that allows for 3d imaging, therefore better for diagnostic purposes. Uses include scans of the bones, lungs, heart. Read more...
Tomography. The nuclear medicine gamma camera moves 360 degrees around patient stopping for information at 64 stops. This allows reconstruction of images in three different planes similar to ct, coronal, sagittal, and transaxial. Some times abnormalities less than centimeter can be detected. Can see abnormality in all three planes. Spect is used for imaging heart, bone, brain, and certain tumors. Read more...
SPECT... In spect, a camera rotates around the patient and allows reconstruction of data so the body can be viewed similar to ct scan. One can scroll through axial, sagittal, or coronal slices to examine tracer distribution in the body. Spatial resolution of spect is worse than planar imaging however contrast resolution is much better, allowing us to distinguish count differences in adjacent tissues. Read more...