single photon emission computed tomography system (SPECT) based on a rotating gamma camera, consisting of one or more probes (including collimators, crystals and light guides, photomultiplier tube matrix, etc.), pulse amplitude analyzer, rotating rack, low-attenuation examination bed, image processing and output devices, etc.

Photon emission computed tomography (PET/SPECD systems, like any imaging apparatus, require periodic performance testing.
Carlson phantom,Carlson SPECT QA phantom helps provide the data for such evaluations. It permits measurements of the resolution of "hot" lesions in a cold field, "cold" lesions in a "hot" (or radioactive) field, linearity, uniformity of response to a uniform field, and a simple way to find the center of rotation. In addition, a more
sophisticated test suitable for acceptance testing may be done by measuring the point spread function,
from which the MTF may be calculated.

Carlson SPECT QA phantom has three Insert: Linearity Insert, "Cold" Lesion Resolution Insert,Linearity/ Uniformity Insert

Carlson phantom, Carlson SPECT QA phantom meet the following standards:

GB/T18988.2-2013 and IEC61675-2:1998，MOD, NEMANU1-2007

Carlson phantom is also known as single-photon emission computed tomography imaging phantom (SPECT).

SPECT is to inject single-photon radionuclides into the human body, collect information at different angles through the rotation of the probe and reconstruct the image to obtain the image of the radioactive spatial distribution of each fault, and is also applied to the static, dynamic, gated and whole-body scan images that can be obtained by the gamma camera.

Linearity Insert

 

Carlson phantom,Carlson SPECT QA phantom is used to calibrate the resolution, spatial linearity and uniformity performance of the hot and cold zones of the tomographic image. The outer diameter of the phantom is 22 cm and the length is 31 cm.

"Cold" Lesion Resolution Insert

"Cold" Lesion Resolution Insert  is 7 plexiglass rods and solid balls (see Figure A1), with recommended diameters of 4.7 mm, 5.9 mm, 7.3 mm, 9.2 mm, 11.4 mm, 14.3 mm, and 17.9 mm. The balls are attached to the rods and have the same diameter as the corresponding rods. After the radioactive solution is injected into the phantom, the rods and balls are cold zones.

Figure A1

"Hot" Lesion Insert

The hot zone inserts are 8 pairs of circular holes in the plexiglass (see Figure A.2), with recommended hole diameters of 4.7 mm, 5.9 mm, 7.3 mm, 9.2 mm, 11.4 mm, 14.3 mm, 17.9 mm, and 22.4 mm. After the radioactive solution is injected into the phantom, the circular holes become the hot zone.

Figure A2

Linearity/ Uniformity Insert

The spatial linearity and uniformity plug-in is a staggered grid of plexiglass blocks consisting of 32 square holes (see Figure A3).

Figure A3

PET/SPECT Phantom Source Tank, Phantom Inserts and Cardiac Insert