Voxel - Samenvattingen, Aantekeningen en Examens

RADT 1065 EXAM QUESTIONS WITH ALL CORRECT ANSWERS when processing the PSP plate, the analog signal is digitized and divided into a matrix of squares. Each square is a A) detector element (DEL) B) field of view (FOV) C) picture element (pixel) D) volume element (voxel) - Answer C) picture element (pixel) the useful imaging area of the digital receptor is the A) detector element (DEL) B) field of view (FOV) C) thin-film transistor (TFT) D) values of interest (VOI) - Answer B)...

Matrix size formula CORRECT ANSWER DFOV/Matrix size x length of voxel What are the four parenteral routes? CORRECT ANSWER Intramuscular, Intravenous, Intradermal, Subcutaneous Increases in Partial Volume Effect means increase in what CORRECT ANSWER Section width Beam pitch formula CORRECT ANSWER Beam Pitch (MSCT)=table feed per rotation/total collimation Normal Platelet count CORRECT ANSWER 150,000-400,000 On MDCT cardiac exams, what HU is determined calcification CORRECT ANSWER ^...

The smallest object that can be resolved in an image acquired with a 20cm FOV and a 224 x 224 matrix is _________ mm. correct answers0.89 200 mm ÷ 224 = 0.892mm The smallest object that can be resolved in an image acquired with a 24cm FOV and a 272 x 272 matrix is _________ mm. A. 0.76mm B. 0.88mm C. 0.93mm D. 1.13mm E. 1.24mm correct answers0.88. 240 ÷ 272=0.88MM What would the scan time be in a 3D volume acquisition as follows: TR 32 ms, TE 4 ms, Flip Angle 15°, FOV 18cm, 2mm s...

Mosby CT Registry Review 2024 Questions and Answers 100% Pass What is the smallest component of a digital image - Correct Answer ️️ -pixel How many CT numbers are assigned to each pixel in the image matrix? - Correct Answer ️️ -One In a CT image, the CT number - Correct Answer ️️ -Of a material is dependent on its linear attenuation coefficient Each two-dimensional square of data that make up the CT image is called a - Correct Answer ️️ -pixel What is an element of the d...

Image produced is a transaxial or transverse that is perpendicular to the long axis of the body correct answers CT The plane of the image is parallel to the long axis of the body correct answers Axial tomography The part of the CT scanner that houses the x-ray tube, cooling system, detector assembly, and data acquisition system (DAS) correct answers Gantry Related to the x-ray attenuation coefficient of the tissue contained in the voxel correct answers Hounsfield unit (HU) When sourc...

Is SNR proportional or inversely proportional to voxel volume - Proportional 3 fields used in MRI - -static magnetic field -TVMF (gradient field) -RF field 3 main types of magnets used - -Superconducting (most common_ -Resistive -Permanent FDA limits for the 3 fields in MRI - Static field: 2T TVMF: 3T/s RF field: - does not cause an increase in temperature of more than .5 deg C or any body part of 1 deg C -SAR does not exceed 1W/kg avg over 25% of whole body for longer than 15mins -S...

ARRT CT REGISTRY PHYSICS QUESTIONS WITH VERIFIED SOLUTIONS GRADED A+ The main advantages of CT over conventional radiography are - ANSWER - Elimination of superimposed structures - the ability to differentiate small differences in density of an atomic structures - superior quality of the images Computer tomography for technologists exam review Romans chapter 1 page 3 CT image quality is evaluated using a number of criteria including - ANSWER - spatial resolution - low contrast reso...

ARRT MRI Mock Registry exam questions and answers 2024 When imaging a geriatric patient, while performing a PCA MRA sequence, what imaging parameter might the operator adjust? A. Field of view B. Presaturation band location C. Slice thickness D. VENC E. Contrast injection rate - ANSWERS VENC As the number of phase encodings is increased from 256 to 512, SNR (signal to noise ratio): A. Increases B. Decreases C. Doubles D. Does not change E. Quadruples - ANSWERS Decreases A magn...

MRI CAMRT Exam Questions With Complete Solution Is SNR proportional or inversely proportional to voxel volume -Correct Answer-Proportional 3 fields used in MRI -Correct Answer--static magnetic field -TVMF (gradient field) -RF field 3 main types of magnets used -Correct Answer--Superconducting (most common_ -Resistive -Permanent FDA limits for the 3 fields in MRI -Correct Answer-Static field: 2T TVMF: 3T/s RF field: - does not cause an increase in temperature of more than .5 deg...

Mosby CT Registry Review Questions and Answers Already Graded A What is the smallest component of a digital image pixel How many CT numbers are assigned to each pixel in the image matrix? One In a CT image, the CT number Of a material is dependent on its linear attenuation coefficient Each two-dimensional square of data that make up the CT image is called a pixel What is an element of the digital image pixel Which of the following influences the spatial resolution in cardiac CT imaging *det...