Incremental diagnostic utility of systematic double-bed SPECT/CT for bone scintigraphy in initial staging of cancer patients View Full Text


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Article Info

DATE

2017-06-07

AUTHORS

Catherine Guezennec, Nathalie Keromnes, Philippe Robin, Ronan Abgral, David Bourhis, Solène Querellou, Romain de Laroche, Alexandra Le Duc-Pennec, Pierre-Yves Salaün, Pierre-Yves Le Roux

ABSTRACT

BackgroundSPECT/CT has been shown to increase the diagnostic performance of bone scintigraphy for staging of malignancies. A systematic double-bed SPECT/CT of the trunk may allow further improvement. However, this would be balanced by higher dosimetry and longer acquisition time. The objective was to assess the incremental diagnostic utility of a systematic double-bed SPECT/CT acquisition for bone scintigraphy in initial staging of cancer patients, especially compared with the usual approach consisting in a whole body planar scan (WBS) plus one single-bed targeted SPECT/CT.MethodsOne hundred two consecutive patients referred for bone scintigraphy for initial staging of malignancy were analyzed. All patients underwent a double-bed SPECT/CT acquisition of the trunk. Images were interpreted by two nuclear medicine physicians in a 3-step procedure. Firstly, only WBS planar images were used; secondly, one additional single-bed SPECT/CT chosen based on planar images was used; finally, WBS planar and double-bed SPECT/CT images were interpreted. Lesions were classified as benign, equivocal or suspicious for metastasis. A per-lesion, per-anatomical region and per-patient analysis was performed.ResultsIn a per-lesion analysis, the number of equivocal and suspicious lesions was 91 and 241 using WBS planar images, 17 and 259 using a single-bed SPECT/CT acquisition and 11 and 269 using double-bed SPECT/CT images, respectively. In a per-patient analysis, the diagnostic conclusion was negative, equivocal or suspicious for malignancy in 35, 53 and 14 patients using WB planar images, 77, 6 and 19 patients using an additional single-bed SPECT/CT and 76, 7 and 19 using double-bed SPECT/CT images, respectively.Seventeen lesions unseen on WBS images were interpreted as suspicious (n = 12) or equivocal (n = 5) on double-bed SPECT/CT images. Six lesions unseen on “WBS + targeted single-bed SPECT/CT” were interpreted as suspicious on double-bed SPECT/CT, with no shift in the metastatic status of patients.ConclusionA systematic double-bed SPECT/CT acquisition has a limited incremental diagnostic value over an oriented single-bed SPECT/CT in terms of specificity and conclusiveness of bone scintigraphy in the initial staging of cancer patients. However, it slightly improved the sensitivity of the test by detecting unseen lesions on WBS, which may be of value for initial staging of cancer. More... »

PAGES

16

Identifiers

URI

http://scigraph.springernature.com/pub.10.1186/s40644-017-0118-4

DOI

http://dx.doi.org/10.1186/s40644-017-0118-4

DIMENSIONS

https://app.dimensions.ai/details/publication/pub.1085907157

PUBMED

https://www.ncbi.nlm.nih.gov/pubmed/28592305


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56 incremental diagnostic value
57 initial staging
58 lesion analysis
59 lesions
60 long acquisition times
61 malignancy
62 medicine physicians
63 metastasis
64 metastatic status
65 nuclear medicine physicians
66 number
67 objective
68 patient analysis
69 patients
70 performance
71 physicians
72 planar
73 planar images
74 planar scans
75 procedure
76 region
77 scans
78 scintigraphy
79 sensitivity
80 shift
81 specificity
82 staging
83 staging of malignancy
84 status
85 suspicious lesions
86 terms
87 terms of specificity
88 test
89 time
90 trunk
91 unseen lesions
92 usual approach
93 utility
94 values
95 whole-body planar scans
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