hey guys jim here today we're going to go over some sp board questions that will help you study for your upcoming ultrasound physics registry feel free to pause the video after i ask the question giving you enough time to answer it before i answer it let's get started question one the location of the ultrasound beam where the diameter is the most narrow is called the is it a focal depth b focal length c focal zone or d focus the answer is d focus question two the focal zone is the region around the focus where the beam is is it a the narrowest b relatively narrow c half the beam diameter of the transducer or is it d afford the beam diameter of the transducer the answer is b relatively narrow question three blank has half of its portion located in the fresnel zone and half of its portion located in the front offer zone this is a the focal length b focal zone c focal point or d focal depth the answer is b focal zone question four according to the doppler equation for any given velocity the frequency shift will increase by increasing the is it a doppler angle b transmit frequency c pulse length or d pulse repetition frequency the answer is b transmit frequency question five which of the following predicts the onset of turbulent flow is it a concentration of energy b continuity rule c aliasing or d reynolds number the answer is d reynolds number question six while evaluating arteries in the body with color doppler you are unable to obtain signals from the deeper vessels what should you do to enhance your ability to demonstrate deep flow do you a decrease the packet size b increases scanline density c increase the pulse repetition frequency or dod decrease the ultrasound frequency the answer is d decrease the ultrasound frequency question seven which of the following helps to improve the axial resolution in a b mode image is it a increase the aperture size b increase the bandwidth c use focusing with an acoustic lens or d increases dynamic range the answer is b increase the bandwidth question 8 what is the direction of blood flow in this video let me zoom in here is it a right to left b left to right or is it c unable to determine blood flow direction let me zoom in again the answer is c unable to determine blood flow direction this is called power doppler and notice there's no color scale over here so power doppler doesn't allow us to determine the blood flow direction but it will allow us to determine whether or not there's flow or not question nine which transducer in this video will have a cosine of 0.5 is it a transistor d b transistor c c transistor b or is it d transistor a let me zoom in here again which transducer will give us a cosine of 0.5 the answer is c transducer b question 10 noise arising from small amplitude sound waves interfering with each other is called what is it a reverberations b aliasing c ghosting or d acoustic speckle the answer is d acoustic speckle question 11 what appears as very small amplitude echoes from electrical interference that affects low-level echolusion areas is it a shadowing b multi-path c noise or d ghosting the answer is c noise question 12 how many bits are required to display 15 different shades of gray is it a 4 bits b 3 bits c 8 bits or d ten bits the answer is a four bits question thirteen line density in a rectangular image is is it a the number of scan lines per degree b this the number of scan lines per centimeter c the number of scan lines per second or is it d the number of scan lines per piezoelectric crystal the answer is b the number of scan lines per centimeter question 14 which of the following will have the greatest improvement of temporal resolution is it a double the line density and decrease depth by half b double the persistence and scan structures more shallow c decrease the depth from 10 centimeters to 5 centimeters and reduce scan lines by half or is it d change frequency from three megahertz to six megahertz and decrease the line density by half the answer is c decrease the depth from 10 centimeters to 5 centimeters and we do scan lines by half question 15 which of the following is the most appropriate response when a patient refuses an exam is it a immediately stop the exam and leave is it b convince the patient that the doctor really wants the exam and proceed is it c ignore the patient's request and continuous planned or is it d place the restraints and or sedation and proceed with the examination the answer is a immediately stop the exam and leave question 16 the two most common color maps used in colorful imaging are is it a variance indirect b variance at velocity c turbulent and variance or is it d power and velocity the answer is b variance and velocity question 17 the velocity scale on the color map is 17 centimeters per second if the flow direction is at zero degrees to the sound beam axis the colors on either end of the bar would represent is it a a peak velocity of 17 centimeters per second b an average velocity of 17 centimeters per second c a peak velocity above 17 centimeters per second or is it d a peak velocity below 17 centimeters per second the answer is b an average velocity of 17 centimeters per second question 18 you are performing 3d sonography and notice the volume rate is 8 hertz what does this represent is it a number of transmitted sound pulses per second b number of received pulses per minute c number of volumes displayed per second or is it d number of frames per second the answer is c number of volumes displayed per second question 19 how many frames must be presented for the human eye to perceive the display without flickering is it a 10 frames b 30 frames c 100 frames or is it d 200 frames the answer is b 30 frames question 21 which of these is a binary number and i'm not going to name up the numbers is it a b c or d the answer is b a binary number is a string of ones and zeros if you look at all the rest of these this one's pretty close but it has a two there so that does not qualify as a binary number this one does even though it just has one one and these ones are obviously not it question 23 when practicing universal precautions you should do all the following except is it a wash gloves between exams for reuse from one place to another b wash hands immediately after gloves are removed c change gloves when moving from one patient to another or d where face mask or eye protection whenever there is a possibility of blood splashing into your face the answer is a wash gloves between exams for reuse from one patient to another just throw them away and get brand new gloves question 24 when an ultrasound system creates an image in 1 20th of a second what will be the frame rate is it a 0.20 hertz b 20 hertz c point 20 megahertz or is it d 20 megahertz the answer is b 20 hertz question 25 which of the following will improve temporal resolution is it a more pulses per scan line b longer time frame c longer go return time or is it d low line density the answer is d low line density having a low line density will improve temp resolution because you have less scan lines per frame that concludes our first test of 25 questions i will hurry and write 25 more questions and upload that video as quickly as possible this is jim with ultrasoundboy.com thanks for watching