What does the image intensity in an MRI depend on ?
Which of the following does the intensity of a sound wave not depend on? O The distance from the source of the sound. O The density of the medium in which the sound is traveling. O The cross-sectional area of whatever is receiving the sound. © The power output of the source of the sound. O The velocity of sound in the medium in which the sound is traveling. o The amplitude of the sound produced by the source.
From pictures below identify the which image is a CT image, MRI image, X-Ray image or Ultrasound image. Justify your answer. Image 1 Image 2 Image 3
2. In modem digital radiography, what types of image receptors are currently used, what does image display/correction/enhancement software do and what are object artifacts in digital radiography and how do they occur?. 3. What type of imaging (to include X-ray and nuclear medical and MRI imaging modalities) typically has the largest digital electronic file size and why? 4. What factors are required for optimal image quality in SPECT and PET nuclear medical scans?
A patient with a pacemaker is mistakenly being scanned for an MRI image. A 8.5 cm long section of pacemaker wire moves at a speed of 11 cm/s perpendicular to the MRI unit’s magnetic field and a 18 mV Hall voltage is induced. ε = 18 mV v = 11 cm/s l = 8.5 cm What is the magnetic field strength of the MRI in T?
physics 1. What is diffraction? How does diffraction affect the appearance of an image? 2. Amount of diffraction depend on how wavelength of the light compares to the hole it’s going through (how?) 3. Where did cameras originate? (Camera Obscura) 4. What invention revolutionized camera technology? (film) 5. What are the four components of a camera (camera back, lens, diaphragm, shutter) How do Cameras Work? ( 6. What are depth of focus and depth of field? How are they imposed...
Assume the MRI sensor intensity X has a Gamma distribution with u = 12 and a = 2: a. Find o 2 of X. b. Write the PDF of X. c. If Y = 3X + 5, find the mean and variance of Y.
A medical office does MRI (magnetic resonance imagingl scans on patients. it has two MRI mechines. Each scan requires a technician to sun the MRI machine Below is the production function for the offic which shows how many patients the techniclans can scan 10 14 Supoose that the price of the lobor input the MRi technician) ls $200 per day in wages and benelts Suppose also thet the capital input Ohe MRI mechinesj hes a price of $150 per day...
What is the origin of the internal resistance of a battery? Does this depend on the age or the size of the battery?
What is the origin of the internal resistance of a battery? Does this depend on the age or the size of the battery?
Consider imaging an organ with a tumor. In the resulting image, the organ has an intensity I0 and the tumor has intensity It > I0. Which of the following methods can improve the local contrast if the organ is treated as background: a) Multiplying the image by a constant α. b) Subtracting a constant 0 < Is < I0 from the image. Assume I0 = 100, It = 125, α = 3, Is = 50. c) Calculate the local contrast...