PRINCIPLES OF CT. TOMOGRAPHY TOMOS ---SECTION. RADIOGRAPHY LIMITATIONS. SUPERIMPOSITION DIFFICULTY IN DISTINGUISHING BETWEEN HOMOGENOUS OBJECTS OF NON-UNIFORM THICKNESS. . SUPERIMPOSITION. RADIOGRAPHY LIMITATIONTISUE DIFFERENCE SENSITIVITY >10%. TOMOGRAPHY (CONVENTIONAL).
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Sir Godfrey Newbold Hounsfield CBE (28 August 1919 – 12 August 2004) was an English electrical engineer who shared the 1979 Nobel Prize for Physiology or Medicine with Allan McLeod Cormack for his part in developing the diagnostic technique of X-ray computed tomography (CT).
FIRST CLINICAL PROTOTYPE CT BRAIN SCANNER
FIRST SCANS—20 MIN.
LATER REDUCED TO 4.5 MIN.
DR. ROBERT LEDLEY DEVELOPED THE FIRST WHOLE BODY CT SCANNER .
80 X 80 MATRIX
80 x 80
512 x 512
PIXEL SIZE= DFOV (mm)/ MATRIX SIZE