Jonathan Morris

Mayo · Radiology

Background: Medical 3D printing as a component of care for adults with cardiovascular diseases has expanded dramatically. A writing group composed of the Radiological Society of North America (RSNA) Special Interest Group on 3D Printing (SIG) provides appropriateness criteria for adult cardiac 3D printing indications. Methods: A structured liter...

Background Abdominal aortic aneurysm (AAA) models can be manufactured with 3D printing technology. This study describes detailed methodology and validation of endovascular aortic repair (EVAR) simulation using 3D printed AAA model connected to hemodynamic pump. Method The AAA model was printed with Objet500 Connex3 (Stratasys, Eden Prairie, MN) an...

Purpose: To evaluate the use of dual-energy computed tomography (CT) virtual noncalcium imaging (VNCa) to visualize ice ball growth during skeletal cryoablation procedures in the spine and bony pelvis. Materials and methods: Cryoablation was performed in the spine and bony pelvis of swine and human cadavers at 5 and 6 locations, respectively. CT...

Metastatic pheochromocytoma and paraganglioma (PPGL) are incurable neuroendocrine tumors. The goals of treatment include palliating symptoms and reducing tumor burden. Little is known about the use of radiofrequency ablation (RFA), cryoablation (CRYO), and percutaneous ethanol injection (PEI) to treat metastatic PPGL. We performed a retrospective s...

Medical three-dimensional (3D) printing has expanded dramatically over the past three decades with growth in both facility adoption and the variety of medical applications. Consideration for each step required to create accurate 3D printed models from medical imaging data impacts patient care and management. In this paper, a writing group represent...

In this work, we provide specific clinical examples to demonstrate basic practical techniques involved in image segmentation, computer-aided design, and 3D printing. A step-by-step approach using United States Food and Drug Administration cleared software is provided to enhance surgical intervention in a patient with a complex superior sulcus tumor...

Background Alzheimer’s disease prevalence will reach epidemic proportions in coming decades. There is a need for impactful educational materials to help patients, families, medical practitioners, and policy makers understand the nature and impact of the disease. Defining an effective workflow to create such models from existing segmentation tools w...

" The greatest risk factor for fragility fracture is a previous fragility fracture. " During post-fracture follow-up, the orthopaedic surgeon has an opportunity to intervene in the management of osteoporosis. " A novel algorithm for interpreting laboratory values and starting antiresorptive and bone-stimulating agents is presented. . © 2017 by the...

Background The purpose of this study is to provide a framework for the development of a quality assurance (QA) program for use in medical 3D printing applications. An interdisciplinary QA team was built with expertise from all aspects of 3D printing. A systematic QA approach was established to assess the accuracy and precision of each step during t...

The purpose of this study was to use three-dimensional (3-D) printing techniques to construct liver and brain phantoms having realistic pathologies, anatomic structures, and heterogeneous backgrounds. Patient liver and head computed tomography (CT) images were segmented into tissue, vessels, liver lesion, white and gray matter, and cerebrospinal fl...

Recent advances in anatomic rendering software have improved our ability to convert image datasets into file formats that can be used to create highly detailed cardiothoracic models. Parallel improvements in 3D printer technology have decreased the time necessary to produce physical representations of these models. We will describe the use of these...

In complex esophageal cases, conventional two-dimensional imaging is limited in demonstrating anatomic relationships. We describe the utility of three-dimensional (3D) printed models for complex patients to individualize care. Oral effervescent agents, with positive enteric contrast, distended the esophagus during computed tomography (CT) scanning...

PURPOSE Over 65,000 new cases of RCC will be diagnosed this year in the United States. Approximately 50% of RCC patients will present with or subsequently develop metastases after primary treatment. Our purpose is to assess the safety, local control, complications, and adjunctive survival of ablation in treatment of mRCC in this selected cohort. M...

PURPOSE To assess the safety and effectiveness of percutaneous cryoablation to treat limited metastases to the musculoskeletal system with curative intent. METHOD AND MATERIALS From December 2003 to October 2011, 40 cryoablation procedures were performed to treat 52 tumors comprising 16 different tumor histologies in 40 patients with limited muscu...

PURPOSE To study the long term radiographic features and outcomes of percutaneous vertebroplasty with polymethyl methacrylate (PMMA). METHOD AND MATERIALS Using our institutional vertebroplasty database we identified patients who underwent vertebroplasty greater than 5 years ago at our institution. Their medical records were then retrospectively r...

PURPOSE MRI findings within the membranous and bony labyrinth are often subtle and easily overlooked. It is our goal to demonstrate the normal appearance of the inner ear and to describe a variety of inner ear pathologies using tailored MR imaging. METHOD AND MATERIALS High resolution MR Imaging of the labyrinth requires a specialized examination...