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Journal of Nuclear Medicine

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Meeting ReportTechnologist

Usefulness of LEAP collimator in lung ventilation SPECT

Jung Soo Kim, Soo Mee Kim, Jin Eui Kim, Hyun Joo Kim, Jae Sung Lee and Dong Soo Lee
Journal of Nuclear Medicine May 2012, 53 (supplement 1) 2505;
Jung Soo Kim
1Nuclear Medicine, Seoul National University Hospital, Seoul, Republic of Korea
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Soo Mee Kim
2Nuclear Medicine, Seoul National University, Seoul, Republic of Korea
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Jin Eui Kim
1Nuclear Medicine, Seoul National University Hospital, Seoul, Republic of Korea
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Hyun Joo Kim
1Nuclear Medicine, Seoul National University Hospital, Seoul, Republic of Korea
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Jae Sung Lee
2Nuclear Medicine, Seoul National University, Seoul, Republic of Korea
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Dong Soo Lee
2Nuclear Medicine, Seoul National University, Seoul, Republic of Korea
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Abstract

2505

Objectives Although lung ventilation SPECT (LV-SPECT) has a good sensitivity in detection of deep lung lesions, it is difficult to apply the LV-SPECT to patients having breathing problems due to limited examination time. In this study, we evaluated the usefulness of LEAP collimator, which provides high detection sensitivity and tolerable resolution, for the LV-SPECT in terms of diagnostic accuracy and examination time.

Methods Four volunteers inhaled Technegas (370 MBq) and the lung ventilation planar scan (LVPS, 300 counts/view (cpv)) with LEHR collimator was performed using Siemens E.cam scanner as a reference test. LV-SPECT scans were performed with three collimators, LEHR, LEUHR, and LEAP, in low (7 kcpv) and high (70 kcpv) counting modes. The count ratios of left (LT) and right (RT) lung segments were calculated on the geometric mean view of anterior and posterior images for LVPS and on the summed coronal images of LV-SPECT, respectively. Comparing to LVPS, the usefulness of three different collimators for LV-SPECT was evaluated through statistical analysis (paired t-test), on count ratios of lung segments.

Results The average LT:RT ratio in LVPS was 47:53. For LV-SPECT, there were negligible difference of the LT:RT ratios (48:52 on average) among three different collimators in low and high counting modes. Comparing to standard LVPS with LEHR, all LV-SPECTs with different collimators resulted in similar diagnostic accuracy through paired t-test (p>0.05). The scan time in LVPS (6 views) was 17.3 min. For LV-SPECT (128 views) in low counting mode, it took 18.7 (LEUHR), 15.0 (LEHR), and 12.3 min (LEAP), respectively.

Conclusions Comparing to standard LVPS, the LV-SPECT with LEAP in low counting mode provided the comparable diagnostic accuracy in addition to shortened scan time

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Journal of Nuclear Medicine
Vol. 53, Issue supplement 1
May 2012
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Usefulness of LEAP collimator in lung ventilation SPECT
Jung Soo Kim, Soo Mee Kim, Jin Eui Kim, Hyun Joo Kim, Jae Sung Lee, Dong Soo Lee
Journal of Nuclear Medicine May 2012, 53 (supplement 1) 2505;

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Usefulness of LEAP collimator in lung ventilation SPECT
Jung Soo Kim, Soo Mee Kim, Jin Eui Kim, Hyun Joo Kim, Jae Sung Lee, Dong Soo Lee
Journal of Nuclear Medicine May 2012, 53 (supplement 1) 2505;
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