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Additional Identifier	Additional Identifier is a mandatory field for a MDCT Scanner and is meant as a tool for you at the facility to help differentiate between MDCT Scanners if you have more than one scanner or if you simply wish to add more description to your scanner, such as MDCT scanner location. Additional Identifier must be unique between two scanners of the same make and model. What could be the possible values for MDCT Scanner Additional Identifier? ‘Emergency CT’, ‘Room 1’ or ‘2nd Floor, East Wing’, etc.
Beam Shaping Filter	The filter used to shape the x-ray beam to the body habitus What filter was used to shape the x-ray beam? e.g. - bow tie, large bow, etc.
Contrast	Contrast used during the image acquisition Was contrast used during the image acquisition? (YES/NO)
Detector Configuration	The geometrical configuration of detectors used during image acquisition The first part is the number of detectors in the z-axis How many detectors were used in the image acquisition? (must be a whole number between 0 and 400) The second part is the width of each detector What is the width (in mm) of each detector? (must be a number between 0 and 10 with a maximum of three decimal places)
Dose Modulation	Also known as Automatic Dose Modulation, Automatic Exposure Control and Tube Modulation The nomenclature of this parameter will be manufacturer dependent and subject to change over time, e.g. Smart-mA, DoseRight. Care Dose, etc. Was Dose Modulation used during the image acquisition? (YES/NO)
Helical or Axial	The mode of acquiring the image • Helical (also known as Spiral) refers to the method of image acquisition in which the gantry is continuously rotating while objects are simultaneously being translated in the z-direction • Axial refers to the method of image acquisition in which each individual slice is measured at a fixed z-position followed by an appropriate translation in the z-direction Was the image acquired Helically or Axially? (Helical/Axial)
kVp	kilo Voltage peak What was the set kVp for the protocol? (must be a whole number between 70 and 150)
LSPN	Location Specific Practice Number The LSPN is a unique identifier determined by Medicare which is required to be submitted as part of each Medicare Claim What is the LSPN for your facility? (must be given as a six digit number with leading zeros)
mAs	milli Ampere seconds What is the starting mAs for your image acquisition protocol? (must be a number between 50 and 1000 with a maximum of two decimal places)
Noise Index	The Image Quality Reference Parameter for Dose Modulation Also known as • Reference Image (Philips) • Quality Reference mAs (Siemens) • Standard deviation (%), low-dose or high quality (Toshiba) It is expected that the nomenclature of these parameters will change over time (must be given as a whole number between 0 and 999)
No of Phases	The number of phases in the image acquisition How many phases were in the complete scan, not including the scout view? (1/2/3/4)
Pitch	The ratio of the table feed to the total slice collimation • Pitch = d/M×S Where • d is the number of 360° rotations • M is the number of slices • S is the individual slice collimation width • M×S is the isocentric beam width (must be a number between 0 and 3 with a maximum of three decimal places)
Reconstruction Algorithm/Kernel	The Algorithm/Kernel used in the image reconstruction process What Algorithm/Kernel was used in the image reconstruction process? (e.g. bone, standard, soft, etc.)
Reconstruction Slice Width	The slice width (in mm) of the reconstructed image What was the slice width (in mm) in the reconstructed image? (can be multiples e.g. 2, 5, 10)
Rotation Time	The time (in sec) of one 360° rotation What is the rotation time (in sec) during image acquisition (must be a number between 0 and 2 with a maximum of two decimal places)
Scan Field of View	The size (in cm) of the field of view used in the image acquisition What is the scan field of view (in cm) during image acquisition? (can also be non numeric, e.g. large)