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J Nucl Med. 2008; 49 (Supplement 1):428P
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Technologist Student Abstracts

Technologist Student Papers I

ADAC vertex SPECT QC of 99mTc-DTPA renal dynamic scintigraphy

Ke-yi Lu1, Guang Hu1, Xian-feng Li1, Jian-zhong Liu1 and Si-jin Li1

1 Nuclear Medicine, 1st Hospital of Shanxi Medical University, Taiyuan, China

2207

Objectives: Through correcting date requirements,procedure,and summary window for GFR analysis(Gates) of renal dynamic imaging(RDI),we went to implement a QC with RDI.

Methods: 737 pts underwent 99mTc-DTPA RDI,performed with ADAC Vertex SPECT.Pre-injection and post-injection dates requirements (using an attenuating material) were 60secs static images with a matrix size up to 512x512 and 16-bit deep;FLOW was labeled as any matrix size up to 64x64 and 16-bit deep,3 secs-per-frame(sec/F),120 frames(F);FUNCTION was labeled as any matrix size up to 64x64 and 16-bit deep,15 sec/F,56F.Program was process 3 difference kinds programs,which P1 is composed that FLOW (3sec/F,20F) and FUNCTION (3sec/F,100F);P2 is composed that FLOW (3sec/F,20F) and FUNCTION (15sec/F,76F);P3 is composed that FUNCTION ONLY (15sec/F,80F). The pts measured GFR with plasma single-sample method(PSM).

Results: For the 553 pts above 30ml/min GFR with PSM,there are significant correlation between 3 programs of GFR and plasma GFR,and the latter is higher;P1 can’t provide 1/2 Peak Time and better program;P3 can’t provide FLOW curve.For the 184 pts below 30ml/min GFR with PSM,there are significant correlation between the 3 programs of GFR,but the plasma GFR is error;P1 can’t provide 1/2 Peak Time and better program;P3 can’t provide Peak Time(as identify Vascular spike) and FLOW curve.P2 is the best of 3 programs.Renogram structure is optimal that it requires frames are about 80 ones and times are about 20 minute,and that the program curve is smooth and integral.But if only request GFR,P1 was fast been provided.For kidney calices and/or pelvis was finding hydrops,the plasma GFR is higher than 3 programs,and kidney there zones of ROI should be removaled.

Conclusions: For QC of 99mTc-DTPA RDI,the date requirements are composed that P2 with 20 minute,but only request GFR that P1 with 6 minute.





This Article
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Right arrow Articles by Li, S.-j.
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Right arrow Articles by Lu, K.-y.
Right arrow Articles by Li, S.-j.