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Convolution-Based Truncation Correction for C-Arm CT Using Scattered Radiation [chapter]

Bastian Bier, Chris Schwemmer, Andreas Maier, Hannes G. Hofmann, Yan Xia, Joachim Hornegger, Tobias Struffert
2013 Bildverarbeitung für die Medizin 2013  
By reading out the complete detector area, we can use the scatter signal to estimate the truncated parts of the object: The scattered radiation outside the FOV is modeled as a convolution with a scatter  ...  Patient dose reduction in C-arm computed tomography by volume-of-interest (VOI) imaging is becoming an interesting topic for many clinical applications.  ...  For this approach, a projection-based deterministic scatter compensation approach is used.  ... 
doi:10.1007/978-3-642-36480-8_59 dblp:conf/bildmed/BierSMHXHS13 fatcat:d3p7bd74xbdbdpit2ns3eiazzi

Reconstruction from truncated projections in cone-beam CT using an efficient 1D filtering

Yan Xia, Andreas Maier, Hannes G. Hofmann, Frank Dennerlein, Kerstin Mueller, Joachim Hornegger, Robert M. Nishikawa, Bruce R. Whiting
2013 Medical Imaging 2013: Physics of Medical Imaging  
Truncation Robust Algorithm for Computed Tomography (ATRACT).  ...  Very recently, a novel method for region of interest (ROI) reconstruction from truncated projections with neither the use of prior knowledge nor explicit extrapolation has been published, named Approximated  ...  It is an open benchmark for comparison of reconstruction performance using a high resolution C-arm CT data set of a rabbit.  ... 
doi:10.1117/12.2007484 fatcat:3jgtcatvsrgrhmc34qmdgb4dha

Front Matter: Volume 11312

Hilde Bosmans, Guang-Hong Chen
2020 Medical Imaging 2020: Physics of Medical Imaging  
Contents 02 A new concept for fluence field modulation in x-ray CT: the z-sbDBA 11312 03 C-arm CT imaging using the extended line-ellipse-line trajectory: seamless FBP reconstruction from real data  ...  on field emission x-ray source with carbon nanotube emitter 11312 2W Simultaneous scatter rejection and correction method using 2D antiscatter grids for CBCT 11312 2X Projection-based adaptive scatter  ... 
doi:10.1117/12.2570912 fatcat:vl6kcecvhvfr5ogs3og5czzvwq

Image‐based shading correction for narrow‐FOV truncated pelvic CBCT with deep convolutional neural networks and transfer learning

Matteo Rossi, Gabriele Belotti, Chiara Paganelli, Andrea Pella, Amelia Barcellini, Pietro Cerveri, Guido Baroni
2021 Medical Physics (Lancaster)  
As such, this article presents a method based on a convolutional neural network and a novel two-step supervised training based on the transfer learning paradigm for shading correction in CBCT volumes with  ...  Cone Beam Computed Tomography (CBCT) is a standard solution for in-room image guidance for radiation therapy.  ...  Finally, the first study using MC-based CNN CBCT scatter correction F I G U R E 1 Robotic C-arm positioned in the treatment room at CNAO.  ... 
doi:10.1002/mp.15282 pmid:34636429 pmcid:PMC9297981 fatcat:3m6m3rdd2jb4xjrzk55ah4esr4

Truncation compensation and metallic dental implant artefact reduction in PET/MRI attenuation correction using deep learning-based object completion

Hossein Arabi, Habib Zaidi
2020 Physics in Medicine and Biology  
CT-based attenuation corrected PET images were considered as reference for the quantitative evaluation of the proposed approach.  ...  Twenty-five whole-body (WB) co-registered PET, CT, and MR images were used for training and evaluation of the object completion approach.  ...  (A) CT image, MR images (B) before and (C) after truncation compensation, 3-class AC maps obtained from (D) truncated MR image (B) and (E) MR image after correction (C).  ... 
doi:10.1088/1361-6560/abb02c pmid:32976116 fatcat:zvmjo37sgbdnjffs5xxy4ewwcm

A Review of Deep Learning-Based Approaches for Attenuation Correction in Positron Emission Tomography

Jae Sung Lee
2020 IEEE Transactions on Radiation and Plasma Medical Sciences  
stand-alone PET scanners for the realization of low radiation doses.  ...  Alternative approaches that are not dependent on the anatomical images (CT or MRI) can overcome the limitations related to current CT-and MRI-based ACs and allow for more accurate PET quantification in  ...  Fig. 31 . 31 Mitigation of arm position mismatch artifact using MLAA and DL: (a) CT-based μ-map, (b) μ-map derived from emission data using MLAA and DL, (c) corrected PET using CT-based μ-map, and (d)  ... 
doi:10.1109/trpms.2020.3009269 fatcat:c5eizqypcrh3vbnoadglp426fa

MRI‐guided attenuation correction in torso PET/MRI: Assessment of segmentation‐, atlas‐, and deep learning‐based approaches in the presence of outliers

Hossein Arabi, Habib Zaidi
2021 Magnetic Resonance in Medicine  
The bias in standardized uptake value (SUV) was calculated for each approach considering CT-based attenuation corrected PET images as reference.  ...  The deep learning-based method provides promising outcome for synthetic CT generation from MRI. However, metal-artifact and body truncation should be specifically addressed.  ...  approaches. 23 ynthetic CT generation from MRI is of special interest, not only for AC in PET/MRI but also in MRI-guided radiation planning. 12, 24 Online adaptation of radiation treatment plans based  ... 
doi:10.1002/mrm.29003 pmid:34480771 pmcid:PMC9292636 fatcat:3xqmbzjl35effkv7xsz5ysvtt4

Region-of-interest reconstruction on medical C-arms with the ATRACT algorithm

Frank Dennerlein, Andreas Maier, Norbert J. Pelc, Robert M. Nishikawa, Bruce R. Whiting
2012 Medical Imaging 2012: Physics of Medical Imaging  
Recently, a novel, truncation-robust algorithm (ATRACT) has been suggested for 3D C-arm ROI imaging.  ...  In this paper, we report for the first time on the performance of ATRACT for reconstruction from real, angiographic C-arm data.  ...  Kleinszig for discussions and input about clinical applications of ROI imaging in surgery.  ... 
doi:10.1117/12.913274 fatcat:xucdpe7j6rf23mj3biuf7qobsy

Efficient 2D filtering for cone-beam VOI reconstruction

Yan Xia, Andreas Maier, Frank Dennerlein, Hannes G. Hofmann, Joachim Hornegger
2012 2012 IEEE Nuclear Science Symposium and Medical Imaging Conference Record (NSS/MIC)  
The Approximated Truncation Robust Algorithm for Computed Tomography (ATRACT) is able to reconstruct images without the use of any explicit extrapolation schemes, even for highly truncated data.  ...  For the sake of dose reduction to the patient, it is practicable to deploy a collimator to block radiation dose outside volume of interest (VOI).  ...  It is an open-source testing benchmark for comparison of the reconstruction performance using a specific high resolution C-arm CT (Artis Zee, Siemens AG) data set of a rabbit.  ... 
doi:10.1109/nssmic.2012.6551549 fatcat:2smmjuooorgvtgdtko4akcvmyi

Front Matter: Volume 9412

Proceedings of SPIE, Christoph Hoeschen, Despina Kontos, Thomas G. Flohr
2015 Medical Imaging 2015: Physics of Medical Imaging  
algorithm [9412-7] 9412 09 Feasibility of CT-based 3D anatomic mapping with a scanning-beam digital x-ray (SBDX) system [9412-8] 9412 0A Clinical image benefits after model-based reconstruction for low  ...  The last two digits indicate publication order within the volume using a Base 36 numbering system employing both numerals and letters.  ...  technique [9412-154] 9412 47 Anatomy-based transmission factors for technique optimization in portable chest x-ray [9412-155] 9412 48 Low dose scatter correction for digital chest tomosynthesis  ... 
doi:10.1117/12.2184295 fatcat:ewelisqkxvbwbnxeiwhldcrfpi

Scaling calibration in region of interest reconstruction with the 1D and 2D ATRACT algorithm

Yan Xia, Frank Dennerlein, Sebastian Bauer, Hannes Hofmann, Joachim Hornegger, Andreas Maier
2014 International Journal of Computer Assisted Radiology and Surgery  
Purpose Recently, a reconstruction algorithm for region of interest (ROI) imaging in C-arm CT was published, named Approximate Truncation Robust Algorithm for Computed Tomography (ATRACT).  ...  It is our goal to reduce the scaling and offset artifact so that Hounsfield unit (HU) values can be used for diagnosis.  ...  All datasets were acquired on a C-arm CT system (Artis Zee, Siemens AG, Forchheim, Germany).  ... 
doi:10.1007/s11548-014-0978-z pmid:24452281 fatcat:oxobb4ihs5b23e3e5sku2ldqki

A two-stage approach for beam hardening artifact reduction in low-dose dental CBCT [article]

T. Bayaraa, C. M. Hyun, T. J. Jang, S. M. Lee, J. K. Seo
2020 arXiv   pre-print
To suppress such noise, a deep convolutional neural network is complementarily used, where CT images adjusted by the sinogram correction are used as the input of the neural network.  ...  This paper presents a two-stage method for beam hardening artifact correction of dental cone beam computerized tomography (CBCT).  ...  Dual-energy CT [1] , [30] , [56] requires a higher dose of radiation compared with singleenergy CT [10] ; therefore, this approach is not suitable for low-dose dental CBCT.  ... 
arXiv:2010.03778v1 fatcat:gywqbdxpxjhpxc5v2sg5heydee

Tissue dose estimation after extravasation of 177Lu-DOTATATE

Perrine Tylski, Géraldine Pina-Jomir, Claire Bournaud-Salinas, Patrice Jalade
2021 EJNMMI Physics  
of the infusion and three SPECT/CT thoracic acquisitions at T5h, T20h, and T26h.  ...  This work presents a methodology for estimating the dose distribution after an extravasation occurred in September 2017, in the arm of a patient during a 7.4-GBq infusion of Lutathera ® (AAA).  ...  Consent for publication The patient signed informed consent regarding publishing his data and images. Competing interests The authors declare that they have no competing interests.  ... 
doi:10.1186/s40658-021-00378-3 pmid:33788043 fatcat:zs2qayngg5efdomeifoglqudiu

Technical Advances in Image Guidance of Radionuclide Therapy

Casper Beijst, Britt Kunnen, Marnix G.E.H. Lam, Hugo W.A.M. de Jong
2017 Journal of Nuclear Medicine Technology  
One distinct advantage of radionuclide therapies is the potential to use (part of) the emitted radiation for imaging of the radionuclide distribution.  ...  The quality and quantitative accuracy of images used for guidance of radionuclide therapy is continuously being improved, which in turn may improve the therapeutic outcome and efficiency of radionuclide  ...  A prototype was built using a mobile C-arm and a g-camera with a 4-pinhole collimator.  ... 
doi:10.2967/jnmt.117.190991 pmid:29042472 fatcat:rgjo5bhty5dvviu7qkt34ys264

Rationale, Instrumental Accuracy, and Challenges of PET Quantification for Tumor Segmentation in Radiation Treatment Planning [chapter]

Assen S., C. Ross, Hyejoo Kang, Nancy Lee
2012 Positron Emission Tomography - Current Clinical and Research Aspects  
Howard Amols, all of Memorial Sloan-Kettering Cancer Center in New York City, for their helpful discussions of the material presented; of Erin Sculley, of Bucknell University in Lewisburg, PA, for her  ...  Slobodan Devic, of McGill University in Montreal, for providing thoughtful comments, and of Ms.  ...  Vendors currently use CT based scatter correction schemes and apply the corrections so that they are invisible for the user.  ... 
doi:10.5772/31839 fatcat:a7v6vaywgjbbpckyvcrsdismna
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