CT EQUIPMENTS

2. GANTRY
DATA ACQUISITION
SYSTEM
OPERATING
CONSOLE

3.  The CT scanner gantry is a moveable frame that contains the x-ray tube, including:
1.collimators
2. filters.
3. detectors.
4. data acquisition system.
5. positioning laser.

6. Pre patient collimators:
Post patient collimator:

7. 1.A detector can capture ,absorb & convert xray photon to an
electrical signal.
2. Small size with good resolution
1.Scintillation detectors :
This detectors convert the xray into visible light photons .
Uses scintillation crystal coupled to photomultiplier tube
to convert light to electron.
Material used:
1.Sodium iodide
2. Bismuth germanium oxide
3. Cesium iodide
4. Cadmium Tungstate
This detector has photodiodes which convert light photon into
electric signal.
Two types of detectors are
used :

20. Xray photons
Detector detects
intensity
Current = voltage
Analog signal=digital
form
Processed&
reconstructed in the
computer