photopeak

pho·to·peak

(fō'tō-pēk),
The characteristic energies of photons emitted by a radionuclide, used to set scanning parameters.
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The photopeak of 99mTc was 140 keV with a 10% pulse height analyzer window.
Can Neutrophil/Lymphocyte and Platelet/Lymphocyte Rates Predict Bone Metastasis in Prostate Cancer Patients?/Notrofil/Lenfosit ve Trombosit/Lenfosit Oranlari Prostat Kanseri Olgularinda Kemik Metastazini Ongorebilir mi?
The photopeak was 364 keV with a [+ or -]10% window.
Unexpected False-positive I-131 Uptake in Patients with Differentiated Thyroid Carcinoma/Diferansiye Tiroid Karsinomlu Hastalarda Beklenmeyen Yanlis Pozitif I-131 Tutulumu
To measure the sample's activity, the photopeak efficiency (FEPE) of the detector for each photon energy is needed.
Calibration of the Absolute Efficiency of Well-Type NaI(Tl) Scintillation Detector in 0.121-1.408 MeV Energy Range
Anterior cardiac images were acquired at 15 minutes and 4 hours postinjection on a 256 x 256 matrix and an acquisition time of 600 sec, using a 15% energy window centered at the 159 keV photopeak of [sup.123]I.
A Comparative Assessment of Cardiovascular Autonomic Reflex Testing and Cardiac [sup.123]I-Metaiodobenzylguanidine Imaging in Patients with Type 1 Diabetes Mellitus without Complications or Cardiovascular Risk Factors
Data come from the first escape (FE) peak in the case of the 100 cc detector and from the photopeak in the case of the 300 cc detector.
Optimizing the Teflon thickness for fast neutron detection using a Ge detector
For the TlBr crystal grown once, it was not possible to observe the photopeak profile because the pulses generated fall in the electrical noise region.
Influence of Impurities on the Radiation Response of the TlBr Semiconductor Crystal
Whole-body views were acquired on the 140 keV photopeak with a 15% symmetrical window using a 256 x 1024 matrix.
Whole-Body SPECT/CT versus Planar Bone Scan with Targeted SPECT/CT for Metastatic Workup
Conclusion: The photopeak efficiencies decrease as energy increases and the observed efficiency curves were closely with similar studies.
Experimental Investigation on the Photopeak Efficiency of a Coaxial High Purity Germanium Detector for Different Geometries
The samples are measured the next day for the induced Au-198 photopeak at 411.8 KeV.
Fixation and redistribution of arsenic during early and late diagenesis in the organic matter-rich members of the Lockatong Formation, Newark basin, USA: implications for the quality of groundwater
A window of 20% centered on the 140-keV photopeak was used.
IMPACT AND OUTCOME OF MAXIMUM BICYCLE ERGOMETER EXERCISE ON ADENOSINE TC-99M SESTAMIBI MYOCARDIAL PERFUSION IMAGING IN CORONARY ARTERY DISEASE
Daily spectra of radiation were measured throughout the whole experimental procedure, which made it possible to adjust the photopeak windows during the measurements.
Representative elementary length to measure soil mass attenuation coefficient
Silagadze, "A new algorithm for automatic photopeak searches," Nuclear Instruments and Methods in Physics Research A, vol.
A nonparametric peak finder algorithm and its application in searches for new physics

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