COMPARISON OF PERFORMANCE CHARACTERISTICS OF GAMMA CAMERAS WITH SCINTILLATION NaI(TI) AND SEMICONDUCTOR CdZnTe DETECTORS

Armagan Aydin; Füsun Çetin; Mustafa Demir

Makale detayları

COMPARISON OF PERFORMANCE CHARACTERISTICS OF GAMMA CAMERAS WITH SCINTILLATION NaI(TI) AND SEMICONDUCTOR CdZnTe DETECTORS

Yazarlar:

Armagan Aydin | Füsun Çetin | Mustafa Demir

Yayıncı:

Istanbul University

Ana Başlıklar:

Nuclear Medicine

Dergi:

Journal of Advanced Research in Health Sciences Vol.7 Issue 3, pp.174-179

Belge Tipi:

Makale

Yayın Tarihi:

10/2024

Belge Dili:

İngilizce

Document ID (Org No.):

2001340859

pISSN:

2651-4060

Anahtar kelimeler:

Özet:

 Objective: In recent years, gamma cameras with semiconductor detectors CdZnTe have entered routine practise diagnostic scintigraphic imaging in nuclear medicine. In this study, we aimed to compare the performance characteristics of a gamma camera with a semiconductor detector CdZnTe and a conventional gamma camera with a NaITl detector. Material and Methods: In our experimental studies, spatial resolution, energy resolution, and linearity tests were performed using 3 capillary tubes of the same length and thickness, into which the Tc-99m radioisotope with different activities was placed. Sensitivity tests were performed by placing Tc-99m in a plastic Petri dish with a diameter of 3 cm. Scintigraphic images of the capillary tubes and the Petri dish were taken with both gamma cameras under equal geometric conditions. Regions of interest ROI were drawn on the images. The activity amount corresponding to the counts in the ROI was determined. Results: The spatial resolution, energy resolution, and sensitivity values of the gamma camera with the CdZnTe detector and the gamma camera with NaITl detector are respectively: 7.16 mm, 5.1 and 17.5 cpsµCi for CdZnTe, and 13.2 mm, 9.4 and 3.9 cpsµCi for NaITl µCi respectively. Conclusion: According to the results of our study, it was concluded that the energy resolution, spatial resolution, sensitivity, and linearity properties of the gamma camera with the semiconductor CdZnTe detector are superior to those of the gamma camera with the NaITl detector.

 Objective: In recent years, gamma cameras with semiconductor detectors CdZnTe have entered routine practise diagnostic scintigraphic imaging in nuclear medicine. In this study, we aimed to compare the performance characteristics of a gamma camera with a semiconductor detector CdZnTe and a conventional gamma camera with a NaITl detector. Material and Methods: In our experimental studies, spatial resolution, energy resolution, and linearity tests were performed using 3 capillary tubes of the same length and thickness, into which the Tc-99m radioisotope with different activities was placed. Sensitivity tests were performed by placing Tc-99m in a plastic Petri dish with a diameter of 3 cm. Scintigraphic images of the capillary tubes and the Petri dish were taken with both gamma cameras under equal geometric conditions. Regions of interest ROI were drawn on the images. The activity amount corresponding to the counts in the ROI was determined. Results: The spatial resolution, energy resolution, and sensitivity values of the gamma camera with the CdZnTe detector and the gamma camera with NaITl detector are respectively: 7.16 mm, 5.1 and 17.5 cpsµCi for CdZnTe, and 13.2 mm, 9.4 and 3.9 cpsµCi for NaITl µCi respectively. Conclusion: According to the results of our study, it was concluded that the energy resolution, spatial resolution, sensitivity, and linearity properties of the gamma camera with the semiconductor CdZnTe detector are superior to those of the gamma camera with the NaITl detector.

 Objective: In recent years, gamma cameras with semiconductor detectors CdZnTe have entered routine practise diagnostic scintigraphic imaging in nuclear medicine. In this study, we aimed to compare the performance characteristics of a gamma camera with a semiconductor detector CdZnTe and a conventional gamma camera with a NaITl detector. Material and Methods: In our experimental studies, spatial resolution, energy resolution, and linearity tests were performed using 3 capillary tubes of the same length and thickness, into which the Tc-99m radioisotope with different activities was placed. Sensitivity tests were performed by placing Tc-99m in a plastic Petri dish with a diameter of 3 cm. Scintigraphic images of the capillary tubes and the Petri dish were taken with both gamma cameras under equal geometric conditions. Regions of interest ROI were drawn on the images. The activity amount corresponding to the counts in the ROI was determined. Results: The spatial resolution, energy resolution, and sensitivity values of the gamma camera with the CdZnTe detector and the gamma camera with NaITl detector are respectively: 7.16 mm, 5.1 and 17.5 cpsµCi for CdZnTe, and 13.2 mm, 9.4 and 3.9 cpsµCi for NaITl µCi respectively. Conclusion: According to the results of our study, it was concluded that the energy resolution, spatial resolution, sensitivity, and linearity properties of the gamma camera with the semiconductor CdZnTe detector are superior to those of the gamma camera with the NaITl detector.

 Amaç: Son yıllarda yarı iletken dedektörlere CdZnTe sahip gama kameralar, nükleer tıpta tanısal sintigrafik görüntülemede rutin uygulamaya girmiştir. Bu çalışmasında, yarı iletken dedektörlü CdZnTe bir gama kamera ile NaITl dedektörlü konvansiyonel bir gama kameranın performans özelliklerinin karşılaştırılması amaçlanmıştır. Gereç ve Yöntemler: Deneysel çalışmalarımızda, farklı aktivitelerde Tc-99m radyoizotopu yerleştirilen aynı uzunluk ve kalınlığa sahip 3 kapiller tüp kullanılarak uzaysal çözünürlük, enerji çözünürlüğü ve doğrusal testler yapılmıştır. Duyarlılık testleri ise 3 cm çapında plastik petri kabına yerleştirilen Tc-99m ile gerçekleştirilmiştir. Kapiler tüplerin ve petri kabının sintigrafik görüntüleri her iki gama kamera ile eşit geometrik koşullar altında alınmıştır. Görüntüler üzerinde ilgi bölgeleri ROI çizilmiştir. ROIdeki sayımlara karşılık gelen aktivite miktarı belirlenmiştir. Bulgular: CdZnTe dedektörlü gama kamera ile NaITl dedektörlü gama kameranın uzaysal çözünürlük, enerji çözünürlüğü ve duyarlılık değerleri sırasıyla; CdZnTe için 7,16 mm, 5,1 ve 17,5 cpsµCi, NaITl için ise 13,2 mm, 9,4 ve 3,9 cpsµCi olarak bulunmuştur. Sonuç: Çalışmamızın sonuçlarına göre, yarı iletken CdZnTe dedektörlü gama kameranın enerji çözünürlüğü, uzaysal çözünürlüğü, duyarlılığı ve doğrusal özelliklerinin NaITl dedektörlü gama kameraya göre üstün olduğu sonucuna varılmıştır.

Makale detayları

COMPARISON OF PERFORMANCE CHARACTERISTICS OF GAMMA CAMERAS WITH SCINTILLATION NaI(TI) AND SEMICONDUCTOR CdZnTe DETECTORS

Yazarlar:

Armagan Aydin | Füsun Çetin | Mustafa Demir

Yayıncı:

Istanbul University

Ana Başlıklar:

Nuclear Medicine

Dergi:

Journal of Advanced Research in Health Sciences Vol.7 Issue 3, pp.174-179

Belge Tipi:

Makale

Yayın Tarihi:

10/2024

Belge Dili:

İngilizce

Document ID (Org No.):

2001340859

pISSN:

2651-4060

Gamma camera

semiconductor detector

CdZnTe

energy resolution

spatial resolutionGama kamera

yarı iletken dedektör

CdZnTe

enerji çözünürlüğü

uzaysal çözünürlük

Sayı

Makale detayları

Yazarlar: Armagan Aydin | Füsun Çetin | Mustafa Demir

Yayıncı: Istanbul University

Ana Başlıklar: Nuclear Medicine

Dergi: Journal of Advanced Research in Health Sciences Vol.7 Issue 3, pp.174-179

Belge Tipi: Makale

Yayın Tarihi: 10/2024

Belge Dili: İngilizce

Document ID (Org No.): 2001340859

pISSN: 2651-4060

Sayı

Yazarlar:

Armagan Aydin | Füsun Çetin | Mustafa Demir

Yayıncı:

Istanbul University

Ana Başlıklar:

Nuclear Medicine

Dergi:

Journal of Advanced Research in Health Sciences Vol.7 Issue 3, pp.174-179

Belge Tipi:

Makale

Yayın Tarihi:

10/2024

Belge Dili:

İngilizce

Document ID (Org No.):

2001340859

pISSN:

2651-4060