Voxel - Samenvattingen, Aantekeningen en Examens

Questions -- Image production (CT Bootcamp) -- Image Display Questions and Answers Rated A+ What is a pixel? A pixel is a single picture element within the digital image. Calculate the pixel size for a scan of the abdomen using a 40 cm DFOV and a 1024 x 1024 matrix. 0.039 cm or 0.39 mm 40/1024= 0.039 In the table below, indicate how the listed technical changes affect spatial resolution. Technical change --> Change in Spatial Resolution 1) Increased pixel size --> 2) Decreased matrix...

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...

difference between radiography and computed tomography - correct answers radiography reduces 3D patient anatomy to 2D projection image and has superimposition of anatomy; computed tomography has a thin slice/2D image which corresponds to a 3D section of the patient without superimposed anatomy isotropic - correct answers x = y = z in voxel size reason why isotropic voxels are desired - correct answers allows you to create high resolution coronal and sagittal reconstructions; makes it easie...

Gradient Echo - ANSWER In regards to MRI and flowing blood, all of the following naturally offer dark blood without any special imaging requirements, except which? Gradient Echo Fast Spin Echo Spin Echo Inversion Recovery False - ANSWER True or False: Gradient moment nulling predominantly increases intra-voxel dephasing? Time of Flight phenomena - ANSWER If flowing nuclei receive a 90 degree (excitation) but do not receive a 180 degree (rephasing) pulse, no echo will ...

CT TEST REVIEW (TEST Q'S AND A'S FOR CT REGISTRY PREP. THIS IS FROM THE BOOK "COMPUTED TOMOGRAPHY FOR TECHNOLOGISTS: EXAM REVIEW" BY LOIS E ROMANS. PUBLISHED BY WOLTERS KLUWER, LIPPINCOTT WILLIAMS AND WILKINS.) Which is NOT a synonym for the preliminary/localizer image taken at the start of a CT examination? A. Topogram B. Scout C. Scanogram D. Spiral - Correct Answer D. Spiral The ability of a system to differentiate, on the image, objects with similar densities is known as: A. Hig...

Which is NOT a synonym for the preliminary/localizer image taken at the start of a CT examination? A. Topogram B. Scout C. Scanogram D. Spiral - correct answer D. Spiral The ability of a system to differentiate, on the image, objects with similar densities is known as: A. High contrast resolution B. Low contrast resolution C. Spatial resolution D. Temporal resolution - correct answer B. Low contrast resolution Each two dimensional square of data that make up the CT image is cal...

CT REGISTRY STUDY GUIDE QUESTIONS WITH CORRECT ANSWERS FOR GARANTEED PASS What determines how much and what section of the collected raw data is used to create an image - Correct Answer Display field of view The "string of beads" artifact is most closely associated with which of the following? - Correct Answer Maximum intensity projection images A patient has a severe vagal reaction to iodinated contrast material that includes bradycardia should be given a treatment of - Correct Answer ...

The Lisfranc joint is the articulation between the: A. Tarsals and metatarsals B. Metatarsals and lower leg C. Proximal and middle phalanges D. Metatarsals and middl phalanges - ️️A. Tarsals and metatarsals The longitudinal dimension of the voxel corresponds to the _______ of scanning A. x axis B. y axis C. z axis - ️️C. z axis The mAs value for a given acquisition is directly proportional to ______ ____ and inversely proportional to _____ ________ A. Image noise, patient...

ARRT MRI FINAL EXAM (PRINCIPLES OF MRI) ARRT REGISTRY FINAL EXAM WITH ALL 100 QUESTIONS AND CORRECT VERIFIED ANSWERS GRADED A+ (BRAND NEW!!) Which sequence is most INSENSITIVE to magnetic field inhomogeneity? - ANSWER-SPIN ECHO When scanning a patient with chiari malformation, which would be the best imaging plane? - ANSWER-saggital Choose the correct slice thickness to create an isotropic voxel for the following: TR2000 TE 90 matrix 272 x 272 FOV 24cm - ANSWER-Formula: FOV / matr...

Mosby CT Registry Review Questions and Answers 2024 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...