Comprehensive CT Imaging Concepts and Techniques Flashcards Set

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Cards in this deck(99)

What term describes the degree of blackening in radiographic imaging?

What is the measurement of the presence of matter in a given volume?

Which imaging technique is useful for cancer staging and involves creating cross-sectional images of the body?

What is the process called that weakens the X-ray beam as it passes through matter?

What is the best method for measuring attenuation in radiographic imaging?

What are numerical measurements that account for the radiodensity of a material, also known as CT Numbers?

Which generation of CT scanner is known for its translate-rotate geometry and was first installed at Atkinsons Hospital?

Which CT scanner generation was the first to offer whole body imaging and is also known as ACTAS?

Which generation of CT scanner uses a wide fan beam and is prone to ring artifacts?

Which CT scanner generation uses a wide fan beam and a detector ring, resulting in increased radiation dose?

Which generation of CT scanner is known for its high temporal resolution and uses an electron gun?

Which CT scanner generation is an improvement of the 3rd generation and excels in multiplanar reformation?

What technology allows uninterrupted power supply and transfer of electrical information in CT scanners?

Which CT scanner generation is known for its volumetric scanning capability and uses a cone fan beam?

What is the most advanced dose reduction technique that involves dividing the X-ray tube source into smaller beams?

What term describes the splitting of the X-ray beam source in a rotating X-ray machine inside the gantry?

Which technology provides 'Dual Source - Dual Energy' using both high and low emission spectrum in CT scans?

What type of CT scan machine is used in operating rooms and for head scans?

What is the largest component of the CT scan machine, capable of a 15-30 degrees tilt?

What is the term for the opening of the CT gantry?

What is the center of the CT aperture called?

What type of generator produces less than 1% voltage ripple waveform and is compact enough to be positioned inside the CT gantry?

What is the act of manipulating the X-ray beam field size to reduce patient dose and improve image resolution?

What type of collimation is placed at the X-ray tube to restrict the field size before it reaches the patient?

What type of collimation controls slice thickness after the X-ray has passed through the patient?

What component collects the remnant radiation that exits the patient's body in a CT scan?

Which type of detectors use a direct conversion method and ionization to generate electronic signals?

What term describes the period when xenon gases are consumed and cannot detect radiation?

What is the act of replenishing the xenon gases inside the detector called?

Which detectors use an indirect conversion method and photoreactive crystals to generate electronic signals?

What term describes the absence of phosphorescence in X-ray detectors?

What is the ability of X-ray detectors to discriminate between high and low X-rays called?

What term describes the ability of X-ray detectors to produce a steady response?

What is the term for the ability of an X-ray detector to recover from one event to another?

What is the ability of the X-ray detector to detect X-rays called?

What is the ability of an X-ray detector to capture X-ray photons called?

What is the ability to convert X-ray photons to electronic signals known as?

What is the ability of an X-ray detector to absorb X-ray photons called?

What is the patient table or couch made from, known for its stability and low attenuation?

What terms describe the movement of the patient couch towards the aperture in CT scanners?

What is the ratio between one full gantry rotation over table movement in CT scanners called?

What type of table pitch is used for thick slices in contrast studies?

What type of table pitch is used for thin slices in high-resolution imaging?

What system subcomponent collects raw electrical signals from X-ray detectors for image reconstruction?

What component converts electric signals to binary data in CT imaging?

What serves as the link between the radiologic technologist and CT components?

What system is used for storing and communicating medical images in CT imaging?

What is the preliminary scan used as a guide for placing the locator in contrast studies?

What term describes the volumetric angled spaces from within each scan in CT imaging?

What algorithm is used in CT imaging for fast scan times and wide scannable ranges?

What scanning mode involves sequential axial formation of slices parallel to each other?

What is the path of X-rays towards the X-ray detectors in CT imaging called?

What term describes the detection of individual rays and the measurement of attenuation?

What is a complete set group of ray sums in CT imaging called?

What profile classifies the characteristics of each ray sum and correlates its position?

What profile measures the radiation dose of the patient in CT imaging?

What algorithm is known as the 'Unfiltered CT Image' and is no longer used due to artifacts?

What algorithm combines all attenuation profiles to form a CT image using Fourier Transform?

What mathematical function decomposes bundles of digital frequency signals into individual components?

What term describes image reconstruction in real time during a CT scan?

What term describes creating new CT images from old raw data?

What computer algorithm is used to suppress individual digital signals to improve CT image quality?

What filter improves contrast resolution by allowing the passage of low frequency signals?

What filter improves spatial resolution by allowing the passage of high frequency signals?

What CT image reconstruction algorithm compares an assumed image with the original image?

What term describes the measurement data of attenuation values in CT imaging?

What is CT data that has undergone pre-processing and transformations called?

What is the byproduct of CT imaging that represents the final visual output?

What is the 'Picture Element' of a CT image that is 2-dimensional and represents Hounsfield Units?

What is the grid formed by rows and columns of pixels in a CT image called?

What is the 'Volume Element' of a CT image that is 3-dimensional and represents slice thickness?

What is an ideal voxel that denotes no loss of CT data due to volume averaging?

What occurs when voxel size increases, causing the inclusion of multiple data points?

What is the maximum diameter of the area represented by the reconstructed CT image called?

What is the 'Calibration FOV' used for planning before acquiring CT data called?

What is the SFOV size for upper and lower extremities, neck, and head in CT imaging?

What is the SFOV size for thoracic imaging in CT scans?

What is the SFOV size for abdominopelvic imaging in CT scans?

What is the 'Zoom/Target FOV' used for image processing and determining raw data needed for reconstruction?

What post-processing technique adjusts the CT image's different shades of gray?

What is the midpoint value for shades of gray that controls the brightness of a CT image?

What term pertains to the Hounsfield Units included in the image display?

What phenomenon describes when radiation exposure is no longer related to perceived image quality?

What is the measurement of radiation dose in a single CT scan procedure called?

What 2-dimensional image rendering technique uses predetermined values of intensity pixels and voxels?

What projection uses high intensity pixels and voxels while suppressing low intensity ones?

What projection uses low intensity pixels and voxels while suppressing high intensity ones?

What is the 2-dimensional image technique that combines transverse slices to generate planar images?

What 3-dimensional image rendering technique forms a surface using pre-selected pixels and voxels?

What type of segmentation is done manually by a CT technologist and is prone to error?

What type of segmentation is done automatically by the computer to select values?

What 3-dimensional image rendering technique uses all pixel and voxel values to form a volumetric image?

What is the ability of the imaging system to resolve small objects close together as separate objects?

What is the ability of the imaging system to differentiate between objects with similar densities?

What is the ability of the scanner to yield consistent HU values across a homogeneous object?

What is the standard deviation of pixel values obtained from a water bath in CT imaging?

What describes the relationship between the Linear Attenuation Coefficient and Hounsfield Units?

What measures the radiation intensity output of the scanner for compliance with CTDI standards?

What measures slice sensitivity profile and its accurate representation in CT imaging?

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Comprehensive CT Imaging Concepts and Techniques Flashcards Set

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