Page 55 - Physiology and Pathophysiology MNU 2024-2025 نظرى

Clinical pharmacy 2024/2025 Level 2 Pharm D Physiology and Pathophysiology (MD303)

MRI (Magnetic Resonance imaging) يسيطانغملا ن ينرلا

❑ Uses an enormously powerful electromagnetalignصري all the unbound protons in your body (coming from body water H2O = 2 protons)

with the poles of the magnet.
❑ The protons are then ENERGIZED by external magnetic field.
❑ After they're energized' they will emit energy as they return to their 'home ‘position. (Healthy tissue ➔ back rapid, unhealthy tissue back
slow)
❑ Specialized antennae لايراinside the machine 'listen' for these energies and map them, in 3D create images of the anatomy of the

subject.
❑ Extremely powerful computers take the data from the millions of mapped signals and recreate images, either in 3D form, or in 'slices'.
❑ The contrast between different tissues is determined by the rate at which excited atom return to equilibrium state.

f MRI – functional MRI What is MRI used for? لكاشم شودنعمو ميلس نوكي مزلا

 Allows fast acquisition of a complete  Diagnosing a large number of potential problems or abnormal conditionsin many
image slice in as little as 20 milliseconds. different parts of the body as: brain, spine, joints (e.g., knee, shoulder, hip, wrist, and

 Several slices are acquired in rapid ankle), abdomen, pelvic region, breast, blood vessels, heart and other body parts. لك
succession and the data is examined for ءاضعلاا
statistical differences.
 MRI creates pictures that can show differences between healthy & unhealthy tissues.
 So, detects the abnormalities in the body

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