It can analyze the hu regions and image scaling ctp404, the highcontrast line pairs ctp528 to. The catphan 710 set combines several tools for advanced ct measurements in one set. Standard deviations of the normalized results were used to report warning and action levels that ranged from 1% to 9% and 2% to 18%, respectively, for all image. Cbct as a standalone tool for dosimetric calculations towards adaptive replanning. Catphan diagrams taken from catphan manuals, which are all available online. An introduction to tg142 imaging qa using standard. Catphan 504 and catphan 604 versions are automatically identified and analyzed.
Can different catphan phantoms be used in a multicentre. The recommended detail cbct test selection for the catphan 504 is shown. Can different catphan phantoms be used in a multicentre audit of. By analyzing catphan 504 phantom obtained scanning results, it was concluded that the hu values are correctly determined, since the results are in accordance with the manufacturers recommendations. Scanning modescbct scans the following scan modes are used to demonstrate basic cbct operation, functionality, and conformance. Catphan 504 the catphan 504 phantom was distributed through varian to assist in the commissioning and qa of the obi kv imager on its linac systems. The images i have acquired are from a ge ct scanner but i cant seem to get them to work in pylinac as it cant find the hu slice. Rits catphan analysis has been carefully designed to provide automated cbct qa for the varian obi. Interphantom and interscanner variations for hounsfield units. To assess image quality, images of the catphan 504 phantom were analyzed to evaluate the following image quality metrics.
All tests were conducted using the catphan 504 phantom. Siewerdsen jh, cunningham ia, jaffray da 2002 a framework for noisepower spectrum analysis of multidimensional images. The impact of cbct reconstruction and calibration for. Image owl offers additional avanced tools and services, including longitudinal history,with a subscription to the service. Projector features notations used in the documentation where to go for additional information additional projector software and manuals projector part locations projector features the powerlite home cinema 5040ub and 5040ube projectors include these special features. An introduction to tg142 imaging qa using standard imaging. Thisservice can be used with catphan 500, 503, 504, 600, and 700 models.
C a t p h a n 504 m a n u a l the phantom laboratory icia. Accuracy of automatic matching of catphan 504 phantom in. The dosimetric accuracies of catphan 504 and cirs 062 have been evaluated using the kvcbct of varian truebeam linac and eclipse tps. This manual is available in the following languages. Denoised and texture enhanced mvct to improve soft tissue conspicuity. This manual outlines the applications of each module contained in the catphan 500 and 600 phantoms. Jun 01, 2019 schematic of ctp404 test module of catphan 504 phantom used for scanned slice geometry and hu analysis. Ct images of the catphan 504 phantom were reconstructed using conventional filtered backprojection fbp and asir with reconstruction blending levels of 20, 40, 60, 80, and 100%. This manual is intended to supplement the varian cbct procedures and manuals by offering additional details regarding the use of the catphan phantom. The catphan 600 consists of 5 modules enclosed in a 20cm housing.
Attwood, soft xrays and extreme ultraviolet radiation academic, 2005. Image noise was defined as sd of the 10 mm diameter roi located in background at the center of. There are variations of the catphan 500 phantom that are provided through varian ctp 504 and elekta ctp 503. Scatter correction for dual source cone beam ct using the. Catphan 504 phantom was scanned first, in order to verify the hu determination methodology. Jun 01, 2014 nine different catphan phantoms were tested. Published data shows that the acceptable criteria ct nu mber value for air. Nov 01, 2020 on the left is an illustration of an axial slice of the ctp528 module of the catphan 504 phantom, which has 1 to 21 line pair per centimeter high resolution test gauge the phantom laboratory, 20. The cbct images were acquired with the catphan 504 phantom various total mas ratios such as 1. Dose assessment and reconstruction algorithm optimization.
Pdf interphantom and interscanner variations for hounsfield. The catphan phantoms were scanned on a toshiba aquillion one 320 slice ctscanner toshiba medical systems, zoertemeer, the netherlands. Ct automated qa software tools for the catphan phantom and. To evaluate the imaging dose for each protocol, the conebeam dose index cbdi was measured. May 01, 2017 all the cbct image qa can be performed using a catphan 504 ct phantom the phantom laboratory, ny, a wellestablished and validated qa tool that incorporates several modules for ctqa. Our truebeams came with catphan 504 phantoms as accessory. Catphan analysis as done by this module closely follows what is specified in the catphan manuals, replacing the need for manual measurements. Catphan 343 low contrast phantom manual catphan 346 low contrast phantom manual catphan 412424 manual catphan 500600 manual catphan 503 manual catphan 504 manual catphan 604 manual catphan 605 manual catphan 700 manual corgi manual atcm phantom manual.
Pdf assessment of the dosimetric accuracies of catphan 504. The catphan 504 phantom has a design of several modules and is made to measure various image quality indices, such as sensitometry, slice thickness, spatial resolution, contrast, and uniformity. Cbctct detailed catphan qa select measurements as needed from list. Catphan 500 and 600 manual, the phantom laboratory, inc. Introduction the catphan 504 phantom configuration has been selected by varian medical systems. Elekta cat cbct and kv planar the tests in this section correspond to the elekta cat tests. Name, consistence and the function of each module in catphan 504. There are 4 catphan models that pylinac can analyze. Image analysis was done using two methods, automated software and manual analysis. It can load a folder or zip file that the images are in and automatically correct for translational and rotational errors. Effect of radiation dose reduction on image quality in adult. Scatter correction for dual source cone beam ct using the pre.
Catphan 500 and 600 manual free download as pdf file. Distance, angle, profile, histograms, round and square roi. The model number of the phantom defines the type of modules within the phantom. Rando was set up on the linac couch deliberately shifted by 1cm in vertical, lateral, and longitudinal no rotational directions from the reference position. Assessment of the dosimetric accuracies of catphan 504 and cirs 062 using kvcbct for performing direct calculations.
Effect of radiation dose reduction on image quality in. Like the catphan 504, it has the ctp404 module, so i believe it should be possible. Yes catphan offers you to test the spatial resolution with a bar pattern phantom containing 21 different frequencies. Catphan 504 together with iris software was used for comprehensive monthly qa purpose. Dosimetric calculations were made without altering the hu. Development of upright computed tomography with area. For detailed phantom information please refer to the catphan 500 manual.
To measure the image noise, snr and cnr linearity module ctp 404 was used. Additional projector software and manuals projector part locations projector features the powerlite home cinema 5040ub and 5040ube projectors include these special features. Physics background wave phantom paper on 3d ct resolution analysis. Apr 24, 2017 five ct images of a catphan 504 phantom were acquired on the airo mobile ct system, varian edge radiosurgery system cone beam ct cbct, philips brilliance big bore 16 slice ct simulator, and siemens somatom definition as 20 slice ct simulator. On the improvement of cbct image quality for soft tissue. For studying the automatic matching accuracy, the phantom images were acquired with a six. The geometric accuracy of each slice was determined using line profile analysis taken across the fused wire ramp objects of ctp404 module. Refer to these sections to learn more about your projector and this manual. A catphan 504 was scanned with a ge optima rt 580 ct scanner ge healthcare, milwaukee, wi and the images were reconstructed with and without the mar software. In the xi system of tbx linac, kv cbct images can be obtained in six modes. The cat phan 504 phantom consists of 4 modules that cover all required cbct imaging tests for tg142. The following scan modes are used to demonstrate basic cbct operation, functionality, and conformance.
The methods and formulas were based on the literature 2123 and the information supplied by the manufacturer catphan 504 manual, the phantom laboratory. Catphan ctp700, ctp605, ctp604, ctp600, ctp500, ctp504varian, ctp503 elekta, ctp410, ctp411, ctp549 autoselection screen one image per catphan phantom module section catphan 600 ctp528 two images selected resolution gauge and bead image 10 mm off axis from resolution gauge. Engels, nederlands, duits, frans, spaans, italiaans, portugees, russisch, chinees. Analyze all relevant slices of the catphan 504 or 604 in one easy step, and quickly get comprehensive reports for. Image noise was defined as sd of the 10 mm diameter roi located in background at the center of the module. Catphan models 606, 604, 504, and 503 are used with radiation therapy cbct systems and designed to evaluate image performance of both mv and kv ct scanners. Image owl supports all cbct tests suggested by varian provided in their installation product appectance guidelines, outlined below. Iris software reported that the average slice width is 2.
The catphan module automatically analyzes dicom images of a catphan 504, 503, or 600 acquired when doing cbct or ct quality assurance. Ctp404 for geometry and sensitometry, ctp528 for high resolution, ctp515 for low contrast, and ctp486 for uniformity as described in the website and manual. Catphan 500 and 600 manual ct scan medical imaging. The phantom laboratory provides for free a single slice upload version of the service. Rando phantom was imaged for rigid registration study. Evaluation of image quality for different kv conebeam ct. For detailed phantom information please refer to the catphan 604 manual. While manual evaluation of ct or cbct images is theoretically possible, it starts to get. Computed tomography imaging with the adaptive statistical.
Catphan504 is designed to evaluate the performance of axial and. A tg142 toolkit for doing routine linear accelerator quality assurance jrkerns pylinac. Oct 01, 2020 the catphan phantom is modular in construction with each module designed for a specific set of tests. Noise, noise power spectrum nps, contrasttonoise ratio cnr and modulation transfer function mtf were estimated for different scanning parameters and contrast. Bright, highresolution projection system up to 2500 lumens of color brightness color light output and 2500 lumens of white brightness white. The catphan 500 provides a comprehensive set of measurements to measure the maximum performance of your ct scanners sensitometry, uniformity, geometric and lowcontrast sensitivity. Both datasets were analyzed with image owl qa software image owl inc, greenwich, ny.
Osa unwrapping differential xray phasecontrast images. It can load a folder or zip file that the images are in and automatically correct for phantom setup in 6 axes. Catphan phantom family catphan m1 m2 m3 m4 m5 503 404 528 486 elekta 504 528 404 515 486. Picture of the phantom from the catphan 504 manual. Rit mlc qa multileaf collimator qa for varian and elekta. Select acquire new scan and follow the onscreen instructions to. The cbct module automatically analyzes dicom images of a catphan 504, 503, or 600 acquired when doing ct or cbct quality assurance.
Catphan 504 phantom was used to evaluate highcontrast spatial resolution, lowcontrast visibility and uniformity. A rationale for cone beam ct with extended longitudinal field. A tg142 toolkit for doing routine linear accelerator quality assurance jrkernspylinac. This manual is intended to supplement the varian cbct procedures. Either catphan 500, 503, 504, 600 or 604 from phantom laboratory. The dosimetric accuracies of catphan 504 and cirs 062 have been evaluated using the kv. Catphan 504 is designed to evaluate the performance of axial and spiral ct scanners with enhanced sensitometry samples for radiation therapy planning. Evaluation of conebeam computed tomography image quality. Opposed 23 degree wire ramps are used to measure scan slice geometry, verify phantom position and check the patient alignment system and the scanner table incrementation. The shallow 23 degree angle allows for more precise measurement of slice thickness. Catphan504 is designed to evaluate the performance of axial and spiral ct scanners with enhanced sensitometry samples for radiation therapy planning. A rationale for cone beam ct with extended longitudinal. The catphan manual s estimated hu for the sensitometric inserts in the catphan phantom.
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