Universität zu Köln

Hohberg, M., Kobe, C., Taeger, P., Hammes, J., Schmidt, M., Dietlein, F., Wild, M., Heidenreich, A., Drzezga, A. and Dietlein, M. (2019). Combined Early and Late [Ga-68]PSMA-HBED-CC PET Scans Improve Lesion Detectability in Biochemical Recurrence of Prostate Cancer with Low PSA Levels. Mol. Imaging. Biol., 21 (3). S. 558 - 567. NEW YORK: SPRINGER. ISSN 1860-2002

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Abstract

PurposeOur aim was to evaluate the benefit of early (1h post-injection (p.i.)) and late (3h p.i.) [Ga-68]PSMA-HBED-CC positron emission tomography (PET)/x-ray computed tomography (CT) imaging for detection of biochemical recurrence (BCR) of prostate cancer (PCa).ProceduresSeventy patients with BCR of the PCa and prostate-specific antigen (PSA) levels of less than 2.0g/l were subjected to [Ga-68]PSMA-HBED-CC PET (mean injected activity 180MBq). While early imaging contained whole body scans, late imaging was confined to the pelvis and the lower abdomen. Uptake in suspicious lesions was analyzed by peak and maximum standardized uptake values (SUVpeak/max). Tumor-to-background ratios were calculated for all lesions in which the liver served as reference organ. The Wilcoxon matched-pair signed-rank test was used to compare the uptake in suspicious lesions between early and late imaging. Follow-up data were used to validate the existence of the additionally detected lesions.ResultsForty-four of the 70 patients thus examined were interpreted as PSMA-positive in early and/or late scans while 26 remained without suspicion of PSMA tracer uptake. A total of 70 suspicious lesions were analyzed. Ten tumor-suspicious lesions from seven different patients were better or exclusively visible in the late measurements while three tumor-suspicious lesions from three different patients were better or exclusively visible in the early images. A validation by follow-up data was possible for 11 of these 13 additionally detected lesions. In direct comparison between early and late imaging, the mean SUVmax in PSMA-positive lesions was 74% higher (p<0.001) and the mean SUVpeak was 36% higher (p=0.001) in the late scans. The SUVmean in the reference regions was decreasing in the late measurements, whereas the mean TBR increased by a factor of 3 (p<0.001). Taking confirmed lesions only into account, we estimated a 10% gain in additionally detected PSMA-positive lesions (7/70) within the patient cohort.ConclusionsThe time period between injection and data acquisition influences the detection rate of [Ga-68]PSMA-HBED-CC PET/CT. In biochemical recurrence with low PSA levels, late [Ga-68]PSMA-HBED-CC PET/CT imaging offers frequent advantages with regard to lesion contrast.

Item Type:	Journal Article
Creators:	Creators Email ORCID ORCID Put Code Hohberg, M. UNSPECIFIED UNSPECIFIED UNSPECIFIED Kobe, C. UNSPECIFIED UNSPECIFIED UNSPECIFIED Taeger, P. UNSPECIFIED UNSPECIFIED UNSPECIFIED Hammes, J. UNSPECIFIED UNSPECIFIED UNSPECIFIED Schmidt, M. UNSPECIFIED UNSPECIFIED UNSPECIFIED Dietlein, F. UNSPECIFIED UNSPECIFIED UNSPECIFIED Wild, M. UNSPECIFIED UNSPECIFIED UNSPECIFIED Heidenreich, A. UNSPECIFIED UNSPECIFIED UNSPECIFIED Drzezga, A. UNSPECIFIED UNSPECIFIED UNSPECIFIED Dietlein, M. UNSPECIFIED UNSPECIFIED UNSPECIFIED
URN:	urn:nbn:de:hbz:38-147377
DOI:	10.1007/s11307-018-1263-2
Journal or Publication Title:	Mol. Imaging. Biol.
Volume:	21
Number:	3
Page Range:	S. 558 - 567
Date:	2019
Publisher:	SPRINGER
Place of Publication:	NEW YORK
ISSN:	1860-2002
Language:	English
Faculty:	Unspecified
Divisions:	Unspecified
Subjects:	no entry
Uncontrolled Keywords:	Keywords Language GA-68-PSMA-11 HBED-CC; MEMBRANE ANTIGEN; IMAGE QUALITY; T PET/CT Multiple languages Radiology, Nuclear Medicine & Medical Imaging Multiple languages
Refereed:	Yes
URI:	http://kups.ub.uni-koeln.de/id/eprint/14737