SPECT (single photon emission computed tomography) is a nuclear imaging test that evaluates blood flow to organs using radioactive substances and a gamma camera to create 3D images. It is less expensive and more accessible than PET scans, despite offering lower resolution, and is useful in diagnosing various medical conditions including tumors and heart disorders. While SPECT has significant advantages in disease detection, it also involves risks such as radiation exposure and high equipment costs.

1. ‫ميحرلا نمحرلا هللا مسب‬

2. •‫لله‬‫د‬‫م‬‫ل‬‫ا‬‫ن‬‫س‬‫ح‬‫م‬‫ل‬‫ا‬
‫د‬‫ب‬‫ع‬
•‫دي‬‫ي‬‫ر‬‫ل‬‫ا‬‫ن‬‫م‬‫ح‬‫ر‬‫ل‬‫ا‬‫د‬‫ب‬‫ع‬
•‫ي‬‫ع‬‫ي‬‫ل‬‫و‬‫ل‬‫ا‬‫لله‬‫ا‬‫د‬‫ب‬‫ع‬

3. SPECT
• A Single Photon Emission Computed Tomography
(SPECT) scan is a type of nuclear imaging test that
shows how blood flows to tissues and organs,
which means it uses a radioactive substance and a
special camera(gamma camera) to create 3-D
pictures.
• The radioisotopes typically used in SPECT are
iodine-123, technetium-99m, xenon-133, and
fluorine-18. These radioactive forms of natural
elements will pass safely through your body and be
detected by the scanner.

4. • The test differs from a PET scan in that the tracer
stays in your blood stream rather than being
absorbed by surrounding tissues, thereby limiting
the images to areas where blood flows. SPECT scans
are cheaper and more readily available than higher
resolution PET scans.
SPECTPET
lower costvery expensive
uses gamma emitting radioisotope
(tracer)
uses positron emitting radioisotope
(tracer)
less contrast and spatial resolutionbetter contrast and spatial resolution

5. Component of SPECT

6. SPECT scan for brain . The temporal lobe
on the left side of the brain shows less
blood flow than the right.

8. EXAMPLES OF CLINICAL OR RESEARCH
APPLICATIONS
Indications for SPECT/CT include but are not limited to
imaging of the following:
A. Tumors
B. Thyroid disorders
C. Parathyroid disorders
D. Skeleton disorders
E. Inflammation or infection
F. Lymphatic system
G. Heart disorders
H. Brain disorders
I. Other organs

9. PROCEDURE
A. Patient Preparation:
1. Pregnancy and breast-feeding:
2. Before arrival: duration / position
3. Before injection: organ / fetous

10. B. Information Pertinent to Performing
Procedure
1. A focused relevant history related to the type
of SPECT study performed
2. Patient’s ability to lie still for the duration of
the acquisition (15–45 min)
3. History of claustrophobia
4. Patient’s ability to put his or her arms
overhead, if applicable

11. C. Precautions: metallic object
D. Radiopharmaceutical: what are we need?
E. Image Acquisition: arm position / kidney
G. Processing:
H. Interpretation Criteria:
I. Reporting:
J. Quality Control:

12. ADVANTAGES
• Can diagnose several diseases that are very harmful for the
people.
• Some medical institutions are already using it as the most
effective treatment for all kinds of cancer diseases and
conditions.
• Can scan the most sensitive parts of the body of a person
just in case a serious disease is already developing in it.
• With the use of this type of medicine, physician can easily
perform their responsibility in treating their patients.
• Localization of defects is more precise and more clearly
seen by the inexperienced eye.
• Able to provide true 3D information
• Images free of background.

13. DISADVANTAGES
• Requires huge amount of investment. Its
facilities are very expensive.
• It produces mild radiation. If its users are not
careful, it can develop cancer in the health of
several patients.
• It is not advisable for pregnant patients,
although some medical institutions have
protective tools to use to stop radiation from
entering the body of a patient.

14. CONCLUSION
• SPECT being a nuclear medicine imaging
modality , it has all the advantages and
disadvantages of nuclear medicine can be highly
beneficial or dangerous on the application , so is
SPECT .
• In spite of this , Today , nearly all cardiac patients
receive a planar ECT or SPECT as part of their
work-up to detect and stage coronary artery
disease.

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