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Prefers to use magnetic resonance imaging for CT scan in cases of early detection of tumors, stroke and modern in every respect to soft tissue It also prefers to use a CT scan for magnetic resonance cases of bone fractures and cracks
Unlike CT scans, which use X-rays, MRI scans use powerful magnetic fields and radio frequency pulses to produce detailed pictures of organs, soft tissues, bone and other internal body structures. Differences between normal and abnormal tissue is often clearer on an MRI image than a CT.
MRI is useful in multiplanar imaRegarding safety,
MRI is a safer modality than CT, both the imaging system itself ging
CT can outline bone inside the body very accurately, but MRI is more versatile than the X-Ray and is used to examine a large variety of medical conditions.
CT scan usually complets within 5 minutes. Actual scan time usually takes less than 30 seconds. Therefore, CT is less sensitive to the patient movement than MRI. Whereas MRI, depending on what is looking for and where it is needing to look, the scan may be quick (finished in 10-15 minutes) or may take a long time (2 hours).
Physical principles: CT is basicly X-rays, and MR are corelations between magnetic fields.
MRI uses water molecules signal resonance which is non-radiating and is better use to evaluate soft tissue, differentiating normal and abnormal soft tissue, evaluate extension of disease in soft tissue and for early detection of clinically suspected stroke. However, it is time consuming and expensive.
CT uses radiation to produce image, usefull in evaluation of haemorrhagic stroke, bone disease and staging. It is readyly available, fast and less expensive.
In CT scan we use Xrays, and MRI we use Magnetic Field to produce images..
as like CT we have two dimensional images although in MRI we have 3 dimensional images
MRI uses Magnetic field in Producing Image while CT scan uses Radiation
MRI is preferred in evalation of soft tissue
CT is advised as 1st aid of evaluation in some cases such as scan of post traumatic brain haemorrage
ct is better in assessment of bone
A CT scanner sends X-ray beams through the body as it moves through an arc taking many pictures. A CT scan sees different levels of density and tissues inside a solid organ, and can provide detailed information about the body, including the head (brain and its vessels, eyes, inner ear, and sinuses), chest (heart and lungs), skeletal system (neck, shoulders and spine), pelvis and hips, reproductive systems, bladder and gastrointestinal tract.