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Medical Physics Part 1 Questions and Answers with Complete Solutions | Updated 2024

Medical Physics Exam 1 Questions and Answers with Complete Solutions | Updated 2024

Medical Physics Questions and Answers with Complete Solutions | Updated 2024

Medical Physics Questions and Answers with Complete Solutions | Updated 2024

What is the goal of physics? - to use a small number of basic concepts, equations, and assumptions to describe the physical world physics a science that deals with matter and energy and their interactions thermodynamics - the branch of physics concerned with the conversion of different forms of energy What are two subjects within the field of thermodynamics? - heat and temperature What are some examples of thermodynamics? - melting and freezing processes, engines, and refrigerators Wh...

1. Define energy balance. What would be the result of positive energy balance? Negative energy balance? What does the body use for energy during a state of negative energy balance? a. Energy balance: energy consumed is equal to energy expended b. Positive energy balance: energy consumed is more that energy expended; stored of excess energy as adipose tissue c. Negative energy balance: energy expended is more than energy intake; use of stored energy from glycogen, fat, and muscle 2. If Ma...

How to make tangent beams coplanar correct answer: Divergence = arctan((0.5 * width)/distance)) e- density correct answer: e- density = (density*Na*Z)/Aw Percent photon contamination of e- beam with Energy correct answer: [6e = 1 ....... 20e = 5] * 0.6% Virtual e- source distance calculation correct answer: (Rdg@SSD100cm/Rdg@SSDother) = ((VSD+dmax+gap)/(VSD+dmax)) Pixel Dimension & Line Pairs per cm correct answer: FOV/Pixels per FOV & 1/(2*Pixel Dimension) Image data labels ...

US attenuation rule of thumb correct answer: 0.5 dB/cm*MHz in soft tissue Lens dose is calculated at what depth? correct answer: 0.3 cm How many HVLs in a collimator head? correct answer: 2% transmission, so 0.02=2^(-n)-> n=5.6, 6 HVL Temperature and pressure correction correct answer: P0T/T0P, T0=295.2K To maintain an accuracy of 1/x, how many bits are necessary? correct answer: 2^y=x, y=lnx/ln2 ex: 1 ppm -> 2^y=10^6-> 6ln(10)/ln(2)=19.93->20 bits Given an air K...

Vertebral Level of : A: Clavicle B: Scapula correct answer: A: C7-T1 B: T2-T7 What is the master gland and where is it located? correct answer: Pituitary - base of the brain (between the optic nerves) - Hormone production is stimulated by hypothalmus What does the pancreas do? correct answer: Endocrine gland: Produces hormones like insulin, glucagon, etc Digestive organ: secretes pancreatic juice to the small intestine (duodenum) Location of spleen and pancreas correct answer: ...

In a 1.5T MRI, if the temperature is 22C, what is the ratio of spins parallel to B₀ to those antiparallel to B₀? correct answer: 1.00001 A 10kg block of ice is at 15⁰F. How much energy must be transferred in order to heat it to a 55⁰F puddle of water? (specific heat of water is 4186 J/kg⁰C, latent heat of water is 334000 J/kg) correct answer: 4.3458×10⁶ J Charged particle equilibrium assumes which of the following: a) All indirectly ionizing particles deposit energy w...