SPECT is a nuclear medicine imaging technique that uses gamma rays to create 3D images of the distribution of radiopharmaceuticals in the body. It employs a gamma camera that rotates around the patient to detect gamma rays emitted by radiotracers administered to the patient. Common radiotracers used in SPECT include technetium-99m, technetium-201, iodine-123, indium-111, and xenon-133. The gamma camera contains thallium-activated sodium iodide crystals that convert gamma rays into visible light. SPECT is used in cardiac, bone, renal, gastric, hepatobiliary, thyroid, pulmonary, and brain imaging.

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3. SPECT:
•Stands for Single Positron Emission computed tomography.
•It is a nuclear medicine tomographic imaging technique using
gamma rays.
•It gives 3D images.

4. • Spect is a nuclear medicine technique used to create 3D
representation of image by 3D distribution of radiopharmaceutical
with in the patient’s body.
• Spect technique itself a gamma camera.
• Spect is executed through gamma camera.
• It’s also called moving gamma camera.
• While gamma camera is a stationary.

7. Nuclear medicine used:
1) Technetium-99m :
Technetium-99m is a meta stable nuclear isomer of technetium-99,
symbolized as 99mTc, that is used in tens of millions of medical diagnostic
procedures.
2)Technetium Iodide 201:
It is also used in tens of millions of medical diagnostic procedures.

8. DETECTOR CRYSTAL:
* Thallium-activated sodium iodide :
Thallium-activated sodium iodide crystals may be
used as efficient detectors of gamma-rays and other ionizing radiations.
It is sensitive to Gamma radiations, and convert it into visible light.

9. Examples of radio pharmaceuticals used in SPECT:
1) Technetium-99m 6 hours 140KeV
2) Technetium Iodide 201 73 hours 69-80 KeV
3) I-123 13 hours 159KeV
4) In-111 2.83 days 171-245KeV
5) Xe-133 5.25days 81KeV

10. APPLICATION:
 Cardiac
 Whole-body bone
 Renal
 Gastric
 Hepatobiliary
 Thyroid
 Pulmonary
 Brain

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