Emission computed tomography

ICD-9-CM| 92.0-92.1
MeSH| D014055
OPS-301 code| 3-72-3-75

[edit on Wikidata]

Emission computed tomography (ECT) is a type of tomography involving radioactive or emissions. Types include positron emission tomography (PET) and Single-photon emission computed tomography (SPECT).

SPECT is commonly used to diagnose certain diseases.[1] SPECT imaging is conducting by injecting a radioactive probe (or tracer) into the person's blood stream.[1] A 3-dimensional image is produced using cameras that can image radioactive substances as the tracer is absorbed by specific types of body tissue. This type of imaging can sometimes allow the team to gain more information about the function of certain body tissues to help diagnose certain medical conditions.[1]

PET imaging has applications for treating and diagnosing cancer.[2] PET is often conducted by having the person consume a drink that includes radioactive isotopes or by having the isotopes injected into a person's bloodstream. These isotopes are absorbed by different tissues in the body, including malignant tumour cells, and PET imaging can visualize the function or detect tumour cells by visualizing how the isotopes are processed by different cell types and how they decay.[2] This technique may be used to detect tumours because tumour cells sometime process the isotopes differently.[2]

The imaging agent used in SPECT emits gamma rays, as opposed to the positron emitters (such as 18F) used in PET. There are a range of radiotracers (such as 99mTc, 111In, 123I, 201Tl) that can be used, depending on the specific application.

## References

1. ↑ 1.0 1.1 1.2 Yandrapalli, Srikanth; Puckett, Yana (2023), "SPECT Imaging", StatPearls (Treasure Island (FL): StatPearls Publishing), PMID 33232084, http://www.ncbi.nlm.nih.gov/books/NBK564426/, retrieved 2023-10-06
2. ↑ 2.0 2.1 2.2 Auguste, P.; Barton, P.; Hyde, C.; Roberts, T. E. (2011). "An economic evaluation of positron emission tomography (PET) and positron emission tomography/computed tomography (PET/CT) for the diagnosis of breast cancer recurrence". Health Technology Assessment 15 (18): iii–iv, 1–54. doi:10.3310/hta15180. ISSN 2046-4924. PMID 21524363.

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Medical imaging (ICD-9-CM V3 87–88, ICD-10-PCS B, CPT 70010–79999)

X-ray/
Radiography|

| 2D|

| Medical:|

* Pneumoencephalography
* Dental radiography
* Sialography
* Myelography
* CXR
* Bronchography
* AXR
* KUB
* DXA/DXR
* Upper gastrointestinal series/Small-bowel follow-through/Lower gastrointestinal series
* Cholangiography/Cholecystography
* Mammography
* Pyelogram
* Cystography
* Arthrogram
* Hysterosalpingography
* Skeletal survey
* Angiography
* Angiocardiography
* Aortography
* Venography
* Lymphogram
* Orbital radiography

|

Industrial:|

* Radiographic testing

CT scan|

| Techniques:|

* General operation of CT
* Quantitative CT
* High-resolution CT
* X-ray microtomography
* Electron beam computed tomography
* Cone beam computed tomography

|

Targets|

* Coronary
* Calcium scan
* CT angiography
* Abdominal and pelvic CT
* Virtual colonoscopy
* CT angiography
* Coronary CT
* Pulmonary CT
* Head CT
* Thyroid CT
* Whole body imaging
* Full-body CT scan

Other|

* Fluoroscopy
* Dental panoramic radiography
* X-ray motion analysis

MRI|

* MRI of the brain
* MR neurography
* Cardiac MRI/Cardiac MRI perfusion
* MR angiography
* MR cholangiopancreatography
* Breast MRI
* Functional MRI
* Sequences
* Diffusion MRI
* Perfusion MRI
* Tractography
* Synthetic MRI

Ultrasound|

* Echocardiography
* Doppler ultrasonography
* Doppler echocardiography
* TTE
* TEE
* Transcranial Doppler
* Intravascular
* Gynecologic
* Obstetric
* Echoencephalography
* Abdominal ultrasonography
* Transrectal
* Breast ultrasound
* Transscrotal ultrasound
* Carotid ultrasonography
* Contrast-enhanced
* 3D ultrasound
* Endoscopic ultrasound
* Emergency ultrasound
* FAST
* Pre-hospital ultrasound
* Duplex

Radionuclide|

| 2D / scintigraphy|

* Cholescintigraphy
* Scintimammography
* Ventilation/perfusion scan
* Radionuclide ventriculography
* Radionuclide angiography
* Radioisotope renography
* Sestamibi parathyroid scintigraphy
* Radioactive iodine uptake test
* Bone scintigraphy
* Immunoscintigraphy
* Dacryoscintigraphy
* DMSA scan
* Gastric emptying scan

Full body:|

* Octreotide scan
* Gallium 67 scan
* Indium-111 WBC scan

3D / ECT|

| SPECT (gamma ray):|

* Myocardial perfusion imaging

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PET (positron):|

* Brain PET
* Cardiac PET
* PET mammography
* PET-CT
* PET-MRI

Optical/Laser|

* Optical tomography
* Optical coherence tomography
* Confocal microscopy
* Endomicroscopy
* Orthogonal polarization spectral imaging

Thermography|

* non-contact thermography
* contact thermography
* dynamic angiothermography

Target conditions|

* Acute stroke
* Pregnancy

* Category

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