Quality Control Tests of SPECT- CT

Abstract

The one of the aim of nuclear medicine is diagnosis of an abnormal metabolic activities in target organs.  In a routine nuclear medicine imaging procedure, a radiopharmaceutical is used. Radiopharmaceutical’s radionuclide part emits gamma radiation. This radiation is dedected by Gamma Camera or Single Photon Emission Computed Tomography (SPECT). A computed tomography (CT) device was added to the SPECT(SPECT- CT). To combine anatomical images. Image quality of this device is important for accurate diagnosis and treatment of diseases. By means of quality control tests, performance changes of device are dedected. A various quality control parameters such as uniformity, sensivity, resolution, linearity have been developed for Gamma cameras, SPECT. Quality control test results are should be verify by comparing acceptable results. In this study, quality control tests of SPECT-CT are performed as proposed by the National Electrical Manufacturers Association ( NEMA) and it was aimed to investigate some correction methods.

Keywords

• Gamma camera,SPECT,SPECT – CT,Quality control tests

SPECT – BT ’nin Kalite Kontrolleri

Abstract

Nükleer tıbbın amaçlarından biri hedef organlardaki anormal metabolik aktivitelerin tanısıdır. Rutin bir nükleer tıp görüntüleme sürecinde, radyofarmasötik kullanılır. Radyofarmasötiğin radyonüklid kısmı gama radyasyonu yayar. Bu radyasyon Gama Kamera veya Tek Foton Emisyon Bilgisayarlı Tomografi (SPECT) tarafından dedekte edilir. Anatomik görüntüleri birleştirmek için SPECT cihazına Bilgisayarlı Tomografi (BT) cihazı eklenmiştir (SPECT – BT) . Bu cihazın görüntü kalitesi doğru tanı ve hastalıkların tedavisi için önemlidir. Kalite konteol testleri sayesinde, cihazdaki performans değişiklikleri belirlenir. Homojenite, sensivite, rezolüsyon, linearite gibi çeşitli kalite kontrol parametereleri gama kameralar ve SPECT için geliştirilmiştir. Kalite kontrol testi sonuçları kabul edilebilir sonuçlarla karşılaştırılarak doğrulanmalıdır. Bu çalışmada, SPECT-CT'nin kalite kontrol testleri National Electrical Manufacturers Association (NEMA) tarafından önerildiği gibi yapılmış ve bazı düzeltme yöntemlerinin araştırılması amaçlanmıştır.

Keywords

• Gama kamera,SPECT,SPECT-BT,Kalite Kontrol Testleri

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