The investigation of lesion detection performances of gamma probe and gamma camera using a lymph nodes model

Year 2007, Volume: 22 Issue: 4, 159 - 165, 01.05.2007

Bayram Demir Murat Okutan Metin Halaç Mustafa Demir

Abstract

OBJECTIVES The purpose of this study is to investigate lesion detection performances of gamma probe and gamma camera. METHODS Four cylindrical lesions with 0.1, 0.2, 0.4, and 0.8 cm diameter were placed in a phantom to simulate lymph nodes. The images of phantom placed within water were taken with gamma camera and counts of lesion were taken from mimicking lymph nodes using a gamma probe. RESULTS It was determined that lymph node with 0.1 ml volume can be only detected up to 4 cm depth with gamma camera. But, this lesion can be detected up to 7 cm depth when gamma probe is used. CONCLUSION Gamma probe is more effective compared to gamma camera with respect to their lesion detection capacities. The smallest lymph node that gamma camera could identify clearly had a 0.1 cm diameter at 4 cm depth whereas gamma probe could identify the same size up to 7 cm depth.

Keywords

Molecular Probe Techniques, Gamma Cameras, Radionuclide Imaging, Lymph Nodes, Radioisotopes

Gama prob ve gama kameranın lezyon tespit etkinliklerinin lenf düğümleri modeli ile araştırılması

Abstract

AMAÇ Farklı boyutlardaki lenf düğümlerini taklit eden bir model kullanılarak, bu taklit lenf düğümlerinin yerinin ve derinliğinin belirlenmesinde gama kamera ve gama probun etkinliği araştırıldı. GEREÇ VE YÖNTEM Lenf düğümlerini taklit etmek üzere çapları 0.1, 0.2, 0.4 ve 0.8 cm olan dört silindirik lezyon fantoma monte edildi. Görüntüler ve sayımlar, fantom su içinde iken farklı derinliklerde gama kamera ve gama prob ile alındı. BULGULAR Gama kamera ile 0.1 ml hacimli lenf düğümünün en fazla 4 cm derinlikte tespit edilebileceği belirlendi. Aynı boyuttaki taklit lenf düğümünün gama prob değerlendirmesinde ise 7 cm derinliğe kadar varlığının tespit edilebildiği görüldü. SONUÇ Lenf düğümlerinin yerinin belirlenmesinde, gama probun gama kameraya göre daha etkin olduğu görüldü. Gama kamera ile en küçük boyuttaki (0.1 ml) lenf düğümünün 4 cm derinlikteki yeri tespit edilebilirken, gama prob ile aynı lenf düğümünün 7 cm derinlikteki varlığı tespit edilebilmektedir.

Keywords

Gama prob, gama kamera, sentinel lenf düğümü, Tc-99m

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