We have developed a database for estimating organ dose for a single-rotation axial coronary angiography or brain perfusion CT scan with any spectral shape and angular tube-current/voltage modulation settings. The proposed database quantifies dose to a number of radiosensitive organs as a function of both projection angle and incident photon energy so that novel acquisition methods can be investigated. Users of the database are able to take advantage of the precalculated data to estimate organ dose for both existing and novel acquisition techniques without requiring Monte Carlo simulations. The database includes tables quantifying CTDIvol in head and body CTDI phantoms in order to provide approximate conversion factors to reflect the tube output of conventional CT scanners. Overall, the proposed database is intended to facilitate the development of dose reduction methods and optimized single and multiple kVp acquisitions, especially for researchers without the resources required to perform Monte Carlo simulations.
For more information on the use, development, and validation of this database, please see our paper published in Medical Physics. Please cite this paper when referencing use of the database.
F. Rupcich, A. Badal, I. Kyprianou, T. G. Schmidt, .A database for estimating organ dose for coronary angiography and brain perfusion CT scans for arbitrary spectra and angular tube current modulation. Medical Physics, 39 (9), pp. 5336-5346, 2012.
Download entire database: doseDatabase.tar.gz
Download individual organ dose tables:
In total, there are 26 text files, each corresponding to a specific organ (or in some cases a material comprising several organs with similar tissue types). Each file is tab-delimited ascii format, with 1000 rows and 146 columns. Each row represents a projection angle between 0 and 360 degrees in 0.36 degree increments. Projection angle 1 (i.e., 0 degrees) represents the anterior-posterior projection; projection angle 250 (i.e., 90 degrees) represents the lateral projection from the phantom's left side to the right side. Each column represents a monoenergetic energy level between 5 and 150 keV in 1 keV increments.
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CT Organ-Dose Database