Great Reading For ASTRO!

Are you heading to ASTRO next week? If so, take a look at some incredible articles below (some hot off the press!). Please reach out directly to authors on their work or to CaliberMRI on our phantoms. If you’d like to set up a meeting at ASTRO, please reach out to us directly at info@qmri.com. We look forward to working with you! Warm regards, The CaliberMRI team

Apparent diffusion coefficient benchmarking and inter-scanner variability; preparing for biological image guided adaptive radiotherapy treatments (2025)
148 – REPRODUCIBILITY OF APPARENT DIFFUSION COEFFICIENT ASSESSED ON A 1.5 T MR-LINAC AND A 3T SIEMENS MRI SCANNER FOR PROSTATE PATIENTS (2025)
Technical development and In Silico implementation of SyntheticMR in head and neck adaptive radiation therapy: A prospective R‐IDEAL stage 0/1 technology development report (2025)

Older Articles:

Accurate, repeatable, and geometrically precise diffusion-weighted imaging on a 0.35 T magnetic resonance imaging-guided linear accelerator (2023)

ADC measurements on the Unity MR-linac – a recommendation on behalf of the Elekta Unity MR-linac consortium (2020)

Conformance of a 3T radiotherapy MRI scanner to the QIBA Diffusion Profile (2022)

Feasibility of quantitative relaxometry for prostate target localization and response assessment in magnetic resonance-guided online adaptive stereotactic body radiotherapy (2024)

In Vivo and Phantom Repeatability of Diffusion-Weighted MRI Sequences on 1.5T MRI-Linear Accelerator (MR-Linac) and MR Simulator Devices for Head and Neck Cancers: Results from a Prospective R-IDEAL Stage 2a Evaluation of Tumor and Normal Tissue Apparent Diffusion Coefficients as Quantitative Imaging Biomarkers (2022)

Longitudinal assessment of quality assurance measurements in a 1.5 T MR-linac: Part I—Magnetic resonance imaging (Ergys Subashi, Alex Dresner, Neelam Tyagi) (2022)

Longitudinal assessment of quality assurance measurements in a 1.5 T MR‐linac: Part II—Magnetic resonance imaging (2022)

Prospective evaluation of in vivo and phantom repeatability and reproducibility of diffusion-weighted MRI sequences on 1.5 T MRI-linear accelerator (MR-Linac) and MR simulator devices for head and neck cancers (2023)

Quantifying multi-institutional ADC measurement variability of 1.5 T MR-Linacs: A phantom and in-vivo study (2025)

Quantitative magnetic resonance imaging on hybrid magnetic resonance linear accelerators: Perspective on technical and clinical validation (2020)

Technical Development and In Silico Implementation of SyntheticMR in Head and Neck Adaptive Radiation Therapy: A Prospective R-IDEAL Stage 0/1 Technology Development Report (2024)

The Quality Assurance of a 1.5 T MR-Linac (2024)

Validation of daily 0.35 T diffusion-weighted MRI for MRI-guided glioblastoma radiotherapy (2024)

CaliberMRI announces release of the qDisc, a new quantitative MRI phantom for added functionality of the Medium ACR Phantom

BOULDER, Colo., Nov. 26, 2025 /PRNewswire/ — CaliberMRI, an industry leader in standardizing Magnetic Resonance Imaging (MRI), announced the release of a new quantitative MRI phantom compatible with the Medium ACR phantom. CaliberMRI’s qDisc (quantitative Dual Imaging Standardization Compartment) Model 141 allows sites to baseline T1, T2, ADC, and Proton Density in a single slice when scanning the Medium ACR phantom. The qDisc includes the Company’s patented MR readable LC Thermometer and is supported by qCal-MR®, an automated QA/QC analysis software. “This offering provides a practical option for gathering important quantitative metrics during routine scans with an ACR phantom,” says William Hollander, CEO of CaliberMRI. “With the rise of quantitative MRI offerings, the qDisc can be used as a first step toward harmonization of MRI scanners and AI software for analysis”. Hollander added. This phantom is intended to complement CaliberMRI’s more complete phantom platform solutions.

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Happy 75th Birthday to our CEO and Founder, Bill Hollander

Happy 75th Birthday to our CEO and founder Bill Hollander! A scientific instrument maker, Bill started his career at JILA in 1979 (a joint institute between National Institute of Standards and Technology (NIST) and University of Colorado Boulder).

APS Session – Multiparametric Tissue Mimics for Breast Imaging and Medical Device Testing

Multiparametric Tissue Mimics for Breast Imaging and Medical Device Testing
Stephen Russek, Todor Karaulanov (presenter), Willaim Hollander, Chamni Jayarathna, Callie Weiant, John Wenzel, Shannon John

We present our work on developing anatomically realistic, quantitative multiparametric MRI (qMRI) phantoms designed to standardize imaging of both healthy and diseased breast tissue. The lack of standardized, morphology-accurate phantoms currently limits the effectiveness of qMRI in both clinical and research settings. Without realistic tissue-mimicking models, radiologists, technologists, and researchers face challenges in learning optimal acquisition protocols and interpreting quantitative data.

Join Us at RSNA – Booth 7610 – North Hall Level 3

Heading to RSNA? We’ll be exhibiting at Booth 7610 (North Hall Level 3) and would love to discuss QA/QC, AI/ML/DL testing and validation, R&D, and/or custom solutions. Our cloud-based software, qCal-MR, now supports more than 45 scanner makes and models on Canon, GEHC, Hyperfine, Philips, Siemens, and United Imaging Scanners. We’ll be showcasing our new products, and are available to discuss collaborations. Reach out if you’d like to set up a meeting.

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Article Word Cloud!

Take a look at our word cloud: qMRI, imaging, diffusion, T1, T2 ADC Mapping! Reproduciblity! QA/QC! Repeatability, Reproducibility, QA/QC!

2025 – a year in review – 60 papers and hundreds of authors advancing qMRI

Looking back to 2025, we want to thank the hundreds of customers and collaborators who authored more than 60 papers, talks, and abstracts using CaliberMRI phantoms. Products cited include: (1) Relaxometry phantoms (T1, T2, PD) – National Institute of Standards and Technology (NIST)/ISMRM Model 130 (as well as Models 136 and 106) (2) Diffusion phantom […]

Upcoming User Group Sessions – Join Us!

Please join us for our upcoming user group sessions! We’ll be discussing MR-Linac, Diffusion, Repeatability, and Relaxometry.

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April User Group Session! Multisite MRI Intravoxel Incoherent Motion Repeatability and Reproducibility across 3 T Scanners in a Breast Diffusion Phantom: A BReast Intravoxel Incoherent Motion Multisite (BRIMM) Study

Multisite MRI Intravoxel Incoherent Motion Repeatability and Reproducibility across 3 T Scanners in a Breast Diffusion Phantom: A BReast Intravoxel Incoherent Motion Multisite (BRIMM) Study

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CaliberMRI Joins Innosphere’s 2026 Life Sciences Incubator Cohort

CaliberMRI is excited to participate in Innosphere’s 2026 Life Sciences Incubator Startup.

Join us at ISMRM – Booth C15

Advancing Quantitative MRI! Stop by to visit our Booth (C19) at ISMRM to talk about data quality, standardization, reproducibility, and quantitative imaging in the age of AI. Topics: clinical trials, QA/QC, R&D, and AI/ML validation/testing.

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Important Meeting Alert – Please Join the Conversation NIST/NIBIB Symposium on Medical Metrology and Standards for American Healthcare and Commerce Medical Imaging, Devices, Diagnostics

Important Meeting Alert – Please Join the ConversationNIST/NIBIB Symposium on Medical Metrology and Standards for American Healthcare and Commerce Medical Imaging, Devices, Diagnostics The Question: What future medical measurements, metrology, and standards should be prioritized to support U.S. Healthcare?

Open Office Hours – Every Tuesday 9-10 a.m. MDT!

Join us for open office hours! Ask questions about your phantom, qCal-MR and meet others advancing quantitative MRI!

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