CT and MRI

CT and MRI

Two high technology methods of creating images of internal organs. Computerized axial tomography (CT or CAT) uses x rays, while magnetic resonance imaging (MRI) uses magnet fields and radio-frequency signals. Both construct images using a computer.
Mentioned in: Hydronephrosis

Patient discussion about CT and MRI

Q. I get bad headaches had ct scans and m.r.i. even sinus surgery, suffering 2yrs now, dizzness occurs too..

A. If all prior medical investigations turned out normal, and sinus surgery didn't help relieve your symptoms, I would suggest the reason for your headaches is probably migraine attacks, that can cause severe headaches, and no CT scan or MRI can diagnose them. The diagnosis is made clinically, by your doctor. Migraine headaches can be eased by proper medications, before and during an attack. You should consult a neurologist.

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References in periodicals archive ?
The effect of CT and MRI image registration on target volume determination and dose distribution in the radiotherapy planning of brain tumors.
Saima Mushtaq, GE Healthcare's Clinical Leaders for CT and MRI, Murat Karakoc and Dr.
(27) Skeletal surveys, nuclear medicine bone scans, CT and MRI have been the traditional imaging methods for evaluation of LCH organ involvement.
Morphological imaging techniques such as CT and MRI provide anatomical information that is not always enough for the evaluation of biological characteristics of tumours in the head and neck areas.
Here, we performed a retrospective review of Bosniak III renal cystic lesions classified radiographically by CT and MRI at one academic care centre with evaluation of pathological diagnosis and lesions to determine the actual malignancy risk.
Another parameter that we had evaluated in the study was the length of the SSC defect parallel to the long axis of the canal on CT and MRI. The average length of dehiscence in 57 SSCs with defects found on both CT and MRI was measured to be 2.1[+ or -]1.1 mm (range: 0.7-4.8 mm) in CT evaluation and 2.4[+ or -]1.1 mm (range: 1-6 mm) in MRI evaluation.
The median value with interquartile ranges (IQR) of door-to-CT time was 12(6-24) minutes and the time difference between CT and MRI was 180(90-320) minutes.
All the patients were diagnosed according to the diagnostic criteria of early lacunar infarction7; all of them underwent CT and MRI. The age was between 39 and 78 years (average 63.23+-6.75 years).
Here, the exact anatomical allocation of the PET finding is key to correct classification, which can be realized equally well with contrast-enhanced CT and MRI (21).
A total of 37 patients with 42 cystic lesions were included in this study and all the lesions were scanned both by CT and MRI during a 6-month follow-up.
Drawbacks: The lack of depth perception, which is overcome by cross-sectional techniques like CT and MRI. Also, X-rays cannot differentiate as many different tissue types as CT and MRI.