If we acquire an image of a radioactive object utilising a gamma camera, what would be...

If we acquire an image of a radioactive object utilising a gamma camera, what would be the relation that defines the Modulation Transfer Function (MTF) of the imaging system? Describe briefly the parameters

Expert Solution

Presently, the gamma camera system is widely used in various medical diagnostic, industrial and environmental fields. Hence, the quantitative and effective evaluation of its imaging performance is essential for design and quality assurance. The National Electrical Manufacturers Association (NEMA) standards for gamma camera evaluation are insufficient to perform sensitive evaluation. In this study, modulation transfer function (MTF) and normalized noise power spectrum (NNPS) will be suggested to evaluate the performance of small gamma camera with changeable pinhole collimators using Monte Carlo simulation. We simulated the system with a cylinder and a disk source, and seven different pinhole collimators from 1- to 4-mm-diameter pinhole with lead. The MTF and NNPS data were obtained from output images and were compared with full-width at half-maximum (FWHM), sensitivity and differential uniformity. In the result, we found that MTF and NNPS are effective and novel standards to evaluate imaging performance of gamma cameras instead of conventional NEMA standards.

genius_generous answered 2 years ago

1. Compare the image formed by a "pinhole camera" (pupil of your eye) to the object...

1. Compare the image formed by a "pinhole camera" (pupil of your eye) to the object from which the image is formed. (video) 2. What is dispersion of visible electromagnetic radiation (light). Explain. Why would reflecting telescopes not have a dispersion problem?

1. Of the three main radioactive emissions: alpha, beta, and gamma, which would be the least/most...

1. Of the three main radioactive emissions: alpha, beta, and gamma, which would be the least/most harmful to biology and why? Which would be the easiest/hardest to block and how? 2. In some medical procedures, radioactive isotopes are used that have very short half-lives. Why is this desirable and how would these isotopes be obtained since none would be found in supply due to their short half-life?f 3. Different types of imaging - CT, PET, MRI - use different methods...

Find where the object would be to produce an image which satisfies each of the following...

Find where the object would be to produce an image which satisfies each of the following conditions: An inverted image smaller than the object. A magnified and erect image. A magnified image which is inverted. An image which is the same size as the object. An erect image which is about one-third the size of the object. Ray diagrams may be used to support your answers.

What will happen to a image if the object moves away from a concave mirror ?...

What will happen to a image if the object moves away from a concave mirror ? Closer to the mirror? Draw ray diagrams to support your predictions.

(a) What is the distance between an object and its real image formed by a thin...

(a) What is the distance between an object and its real image formed by a thin converging lens with focal length f = 16 cm, if the object distance is 45 cm? (b) What is the minimum object-image distance for a real image formed by that lens?

What is the mystery of gamma rays? What is it that we do not understand?

For a diverging lens of focal length -20cm, for what object distance will the magnification of the image be 0.8?

For a diverging lens of focal length -20cm, for what object distance will the magnification of the image be 0.8?Group of answer choices10cm.8cm.5cm.4cm.2cm.

What would occur if an unfocused slide image was downloaded?

1) For a concave mirror at what object distance does the associated image transition between upright...

1) For a concave mirror at what object distance does the associated image transition between upright and inverted? 2) As the object distance increases through the distance you answered in part one does the image transition from upright to inverted or from inverted to upright? 3) For object distances slightly less than the distance you answered in part one is the image location near or far from the mirror and is it in front of or behind the mirror? 4)...

1. A quasar("quasi-stellar radio source") is a star like object. we would expect one of the...

1. A quasar("quasi-stellar radio source") is a star like object. we would expect one of the wavelength emitted by a quasar to be about 656nm. How ever, we measure this wavelength to be 760nm. How fat are quasars moving relative to us. hint use doppler effect. 2.sunlight (400nm-700nm) going through a diffraction grating results in an interference pattern in the form of a ranbow, a. which end of the spectrum, red or violet, is closer to the central maximum? explain....

Question