J Rottmann
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View article: AAPM Task Group Report 290: Respiratory motion management for particle therapy
AAPM Task Group Report 290: Respiratory motion management for particle therapy Open
Dose uncertainty induced by respiratory motion remains a major concern for treating thoracic and abdominal lesions using particle beams. This Task Group report reviews the impact of tumor motion and dosimetric considerations in particle ra…
View article: Continuous Generation of Volumetric Images During Stereotactic Body Radiation Therapy Using Periodic kV Imaging and an External Respiratory Surrogate
Continuous Generation of Volumetric Images During Stereotactic Body Radiation Therapy Using Periodic kV Imaging and an External Respiratory Surrogate Open
We present a technique for continuous generation of volumetric images during SBRT using periodic kV imaging and an external respiratory surrogate signal to drive a patient-specific PCA motion model. Using the on-board imager, kV radiograph…
View article: Continuous Generation of Volumetric Images During Stereotactic Body\n Radiation Therapy Using Periodic kV Imaging and an External Respiratory\n Surrogate
Continuous Generation of Volumetric Images During Stereotactic Body\n Radiation Therapy Using Periodic kV Imaging and an External Respiratory\n Surrogate Open
We present a technique for continuous generation of volumetric images during\nSBRT using periodic kV imaging and an external respiratory surrogate signal to\ndrive a patient-specific PCA motion model. Using the on-board imager, kV\nradiogr…
View article: Physics considerations in MV-CBCT multi-layer imager design
Physics considerations in MV-CBCT multi-layer imager design Open
Megavoltage (MV) cone-beam computed tomography (CBCT) using an electronic portal imaging (EPID) offers advantageous features, including 3D mapping, treatment beam registration, high-z artifact suppression, and direct radiation dose calcula…
View article: Leveraging multi-layer imager detector design to improve low-dose performance for megavoltage cone-beam computed tomography
Leveraging multi-layer imager detector design to improve low-dose performance for megavoltage cone-beam computed tomography Open
While megavoltage cone-beam computed tomography (CBCT) using an electronic portal imaging device (EPID) provides many advantages over kilovoltage (kV) CBCT, clinical adoption is limited by its high doses. Multi-layer imager (MLI) EPIDs inc…
View article: Spectral imaging using clinical megavoltage beams and a novel multi-layer imager
Spectral imaging using clinical megavoltage beams and a novel multi-layer imager Open
We assess the feasibility of clinical megavoltage (MV) spectral imaging for material and bone separation with a novel multi-layer imager (MLI) prototype. The MLI provides higher detective quantum efficiency and lower noise than conventiona…
View article: A novel method for quantification of beam's‐eye‐view tumor tracking performance
A novel method for quantification of beam's‐eye‐view tumor tracking performance Open
Purpose In‐treatment imaging using an electronic portal imaging device (EPID) can be used to confirm patient and tumor positioning. Real‐time tumor tracking performance using current digital megavolt (MV) imagers is hindered by poor image …
View article: Online Combination of EPID & Cherenkov Imaging for 3-D Dosimetry in a Liquid Phantom
Online Combination of EPID & Cherenkov Imaging for 3-D Dosimetry in a Liquid Phantom Open
Online acquisition of Cherenkov and portal imaging data was combined with a reconstruction scheme called EC3-D, providing a full 3-D dosimetry of megavoltage X-ray beams in a water tank. The methodology was demonstrated and quantified in a…
View article: A novel multilayer <scp>MV</scp> imager computational model for component optimization
A novel multilayer <span>MV</span> imager computational model for component optimization Open
Purpose A novel Megavoltage ( MV ) multilayer imager ( MLI ) design featuring higher detective quantum efficiency and lower noise than current conventional MV imagers in clinical use has been recently reported. Optimization of the MLI desi…
View article: Real-time 3D dose imaging in water phantoms: reconstruction from simultaneous EPID-Cherenkov 3D imaging (EC3D)
Real-time 3D dose imaging in water phantoms: reconstruction from simultaneous EPID-Cherenkov 3D imaging (EC3D) Open
Combination of electronic portal imaging device (EPID) transmission imaging with frontal Cherenkov imaging enabled real-time 3D dosimetry of clinical X-ray beams in water phantoms. The EPID provides a 2D transverse distribution of attenuat…
View article: Super-resolution imaging in a multiple layer EPID
Super-resolution imaging in a multiple layer EPID Open
A new portal imager consisting of four vertically stacked conventional electronic portal imaging device (EPID) layers has been constructed in pursuit of improved detective quantum efficiency (DQE). We hypothesize that super-resolution (SR)…
View article: A novel EPID design for enhanced contrast and detective quantum efficiency
A novel EPID design for enhanced contrast and detective quantum efficiency Open
Beams-eye-view imaging applications such as real-time soft-tissue motion estimation are hindered by the inherently low image contrast of electronic portal imaging devices (EPID) currently available for clinical use. We introduce and charac…
View article: Beam's‐eye‐view imaging during non‐coplanar lung SBRT
Beam's‐eye‐view imaging during non‐coplanar lung SBRT Open
Purpose: Beam's‐eye‐view (BEV) imaging with an electronic portal imaging device (EPID) can be performed during lung stereotactic body radiation therapy (SBRT) to monitor the tumor location in real‐time. Image quality for each patient and t…
View article: 3D fluoroscopic image estimation using patient-specific 4DCBCT-based motion models
3D fluoroscopic image estimation using patient-specific 4DCBCT-based motion models Open
3D fluoroscopic images represent volumetric patient anatomy during treatment with high spatial and temporal resolution. 3D fluoroscopic images estimated using motion models built using 4DCT images, taken days or weeks prior to treatment, d…