What is pulse height resolution?

The pulse height (PH) resolution is defined as . Here the FWHM is the full width at half maximum and PH is the channel number of the maximum of the peak in the spectrum. The resolutions of a 3 crystal re- cently measured under similar conditions are indicated as well for energies at 662, 1173 and 1333 …

What is pulse height distribution?

Pulse height distribution data which is defined as the distribution of the energy deposited in detector volume gives some information about the profiles of emitting radiation source. This non-Boltzmann quantity can be calculated by numerical simulation of the radiation interactions in the detector and its environment.

What is the function of pulse height analyzer?

A pulse height analyzer is an instrument used to analyze the frequency distribution of the spectrum of photon energies that are captured by a gamma camera. Energy windows are selected to only allow certain photon energies that fall within a preset range to contribute to the output pulse.

What is a photopeak?

The photopeak refers to the region of the pulse height spectrum caused by the complete photoelectric absorption of gamma rays by the scintillator crystal of a gamma camera.

How does pulse-height analysis help in the detection of in vivo radioactivity?

Pulse-height analysis on Z pulses allows us to select the pulses of the desired energy. Two important attributes of the Z pulse are linearity with γ-ray energy and its spatial independence (Z pulse-height should not depend on the location of the point of light production in the crystal).

What is the energy resolution of a detector?

ENERGY RESOLUTION. Energy Resolution is the ability of the Detector to accurately determine the Energy of the Incoming Radiation. Since no camera system is perfect, no system is capable of determining precisely what energy photon struck the crystal.

What is in vivo and in vitro nuclear medicine?

In vivo refers to when research or work is done with or within an entire, living organism. Examples can include studies in animal models or human clinical trials. In vitro is used to describe work that’s performed outside of a living organism.

What is in vivo nuclear medicine?

The majority of nuclear medicine procedures are “in vivo” non-invasive procedures. After administration of the radiopharmaceutical typically by intravenous route (sometimes locally) to a patient, its distribution and localization provides functional or metabolic information.

What is pulse height spectra?

Pulse-height spectrometry is used to examine the amplitudes of signals (electrical current or light) from a radiation detector to determine the energies of radiations striking the detector, or to select for counting only those energies within a desired energy range.

What is Compton peak?

Shenandoah National Park. A hike through the forest along the Appalachian Trail to a western view and a great look at columnar jointing, an exciting geologic feature. Distance: 2.4-mile round trip hike. Difficulty: Moderate (explanation of our hiking difficulty scale)