18F-FET-PET in Primary Hyperparathyroidism: A Pilot Study
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18F-FET-PET in Primary Hyperparathyroidism : A Pilot Study. / Krakauer, Martin; Kjær, Andreas; Bennedbæk, Finn Noe.
In: Diagnostics, Vol. 6, No. 3, 30, 2016.Research output: Contribution to journal › Comment/debate › Research › peer-review
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TY - JOUR
T1 - 18F-FET-PET in Primary Hyperparathyroidism
T2 - A Pilot Study
AU - Krakauer, Martin
AU - Kjær, Andreas
AU - Bennedbæk, Finn Noe
PY - 2016
Y1 - 2016
N2 - Preoperative localisation of the diseased parathyroid gland(s) in primary hyperparathyroidism (PHP) is a prerequisite for subsequent minimally invasive surgery. Recently, as alternatives to conventional sestamibi parathyroid scintigraphy, the (11)C-based positron emission tomography (PET) tracers methionine and choline have shown promise for this purpose. We evaluated the feasibility of using the (18)F-based PET tracer fluoroethyl-l-tyrosine (FET), as the longer half-life of (18)F makes it logistically more favourable. As a proof-of-concept study, we included two patients with PHP in which dual-isotope parathyroid subtraction single photon emission computed tomography had determined the exact location of the parathyroid adenoma. A dynamic FET PET/CT scan was performed with subsequent visual evaluation and calculation of target-to-background (TBR; parathyroid vs. thyroid). The maximum TBR in the two patients under study was achieved approximately 30 min after the injection of the tracer and was 1.5 and 1.7, respectively. This ratio was too small to allow for confident visualisation of the adenomas. FET PET/CT seems not feasible as a preoperative imaging modality in PHP.
AB - Preoperative localisation of the diseased parathyroid gland(s) in primary hyperparathyroidism (PHP) is a prerequisite for subsequent minimally invasive surgery. Recently, as alternatives to conventional sestamibi parathyroid scintigraphy, the (11)C-based positron emission tomography (PET) tracers methionine and choline have shown promise for this purpose. We evaluated the feasibility of using the (18)F-based PET tracer fluoroethyl-l-tyrosine (FET), as the longer half-life of (18)F makes it logistically more favourable. As a proof-of-concept study, we included two patients with PHP in which dual-isotope parathyroid subtraction single photon emission computed tomography had determined the exact location of the parathyroid adenoma. A dynamic FET PET/CT scan was performed with subsequent visual evaluation and calculation of target-to-background (TBR; parathyroid vs. thyroid). The maximum TBR in the two patients under study was achieved approximately 30 min after the injection of the tracer and was 1.5 and 1.7, respectively. This ratio was too small to allow for confident visualisation of the adenomas. FET PET/CT seems not feasible as a preoperative imaging modality in PHP.
U2 - 10.3390/diagnostics6030030
DO - 10.3390/diagnostics6030030
M3 - Comment/debate
C2 - 27548229
VL - 6
JO - Diagnostics
JF - Diagnostics
SN - 2075-4418
IS - 3
M1 - 30
ER -
ID: 173164369