Randy O. Chang

ORCID: 0000-0003-0721-9673
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About
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Research Areas
  • Management of metastatic bone disease
  • Spinal Fractures and Fixation Techniques
  • Spine and Intervertebral Disc Pathology
  • Bone Tumor Diagnosis and Treatments
  • Bone health and treatments
  • Bone and Joint Diseases
  • Infectious Diseases and Tuberculosis
  • Sarcoma Diagnosis and Treatment
  • Cerebral Venous Sinus Thrombosis
  • Peripheral Artery Disease Management
  • Orthopedic Infections and Treatments
  • Hematological disorders and diagnostics
  • Medical Imaging Techniques and Applications
  • Trauma, Hemostasis, Coagulopathy, Resuscitation
  • Glaucoma and retinal disorders
  • Neurosurgical Procedures and Complications
  • Coronary Interventions and Diagnostics
  • Gallbladder and Bile Duct Disorders
  • Liver Disease and Transplantation
  • RNA Interference and Gene Delivery
  • Pediatric Hepatobiliary Diseases and Treatments
  • RNA regulation and disease
  • Urological Disorders and Treatments
  • Aortic aneurysm repair treatments
  • Sepsis Diagnosis and Treatment

The Fourth People's Hospital of Ningxia Hui Autonomous Region
2025

Ningxia Medical University
2025

UCLA Health
2022

University of California, Los Angeles
2021

Washington University in St. Louis
2011-2018

Mallinckrodt (United States)
2018

Barnes-Jewish Hospital
2011

National Heart Lung and Blood Institute
1990

<h3>BACKGROUND AND PURPOSE:</h3> Combination radiofrequency ablation and vertebral augmentation is an emerging minimally invasive therapy for patients with metastatic spine disease who have not responded to or contraindications radiation therapy. The purpose of this study was evaluate the rate radiographic local control spinal metastases treated combination augmentation. <h3>MATERIALS METHODS:</h3> We retrospectively reviewed our tumor database all underwent between April 2012 July 2014....

10.3174/ajnr.a4595 article EN cc-by American Journal of Neuroradiology 2015-12-03

<h3>BACKGROUND AND PURPOSE:</h3> Percutaneous radiofrequency ablation combined with vertebral augmentation has emerged as a minimally invasive treatment for patients metastases who do not respond to or have contraindications radiation therapy. The prevalence of posterior body presents access and challenges in the unique anatomy spine. purpose this study was evaluate safety efficacy simultaneous bipedicular using articulating bipolar electrodes local tumor control spinal metastases....

10.3174/ajnr.a5752 article EN cc-by American Journal of Neuroradiology 2018-08-09

Percutaneous transhepatic biliary drainage for bile leaks and fistulasSL Kaufman, S Kadir, SE Mitchell, R Chang, ML Kinnison, JL Cameron RI White, JrAudio Available | Share

10.2214/ajr.144.5.1055 article EN American Journal of Roentgenology 1985-05-01

Vertebral Hounsfield unit (HU) were regarded as a new way to predict fragility fracture. However, HU values measured in single plane, which is not accurate for the entire vertebral body. This study aimed create CT-based metric assessing bone mineral density, three-dimensional value (3D-HU), and evaluate its effect independently predicting fracture (NVF) after percutaneous augmentation (PVA) postmenopausal women. reviewed female patients with osteoporotic compression (OVCF) who treated at our...

10.1186/s13018-025-05651-0 article EN cc-by-nc-nd Journal of Orthopaedic Surgery and Research 2025-03-10

In 12 patients (aged 64 +/- 10 years) with femoropopliteal occlusions (1-27 cm; average, 8.4 cm length) that could not be recanalized by standard guidewire-balloon angioplasty techniques, percutaneous laser-assisted balloon was performed use of a new fluorescence-guided dual-laser system. Plaque detection 325-nm laser-excited fluorescence spectroscopy provided real-time feedback control to 480-nm pulsed dye laser (2-microseconds pulses) for atheroma ablation. By means common 200-microns...

10.1161/01.cir.81.1.143 article EN Circulation 1990-01-01

Papilloedema is a key clinical finding in the diagnosis of idiopathic intracranial hypertension (IIH). However, newly proposed criteria allow without papilloedema only if certain neuroimaging features are present. It currently unclear these findings persist upon resolution and IIH. A retrospective chart review identified three groups patients (six per group) who had received orbital imaging within 4 weeks fundoscopic examination: (1) IIH active papilloedema, (2) with (3) no history or...

10.1080/01658107.2016.1179767 article EN Neuro-Ophthalmology 2016-05-27

Stereotactic radiosurgery and percutaneous radiofrequency ablation are emerging therapies for pain palliation local control of spinal metastases. However, the post-treatment imaging findings not well characterized risk long-term complications is unknown. We present case a 46-year-old woman with delayed vertebral body collapse after stereotactic painful lumbar metastasis. Histopathologic-MRI correlation confirmed osteonecrosis as underlying etiology demonstrated that treatment-induced...

10.1177/1591019915609131 article EN Interventional Neuroradiology 2015-10-23

Radiofrequency ablation is a valuable therapy for palliation of painful spinal metastases and local tumor control; however, accessing the vertebral body can be difficult time consuming with traditional manual needles. Herein, we report our initial experience using drill-assisted, fluoroscopy-guided technique radiofrequency ablation.

10.1177/1591019915594329 article EN Interventional Neuroradiology 2015-07-15

Postoperative aortic graft anastomotic stenoses at nine sites in eight patients were successfully treated with percutaneous transluminal angioplasty. There was a decrease peak systolic pressure gradient all patients, and seven of the symptoms claudication disappeared immediately after Four remained asymptomatic follow-up. Ankle/arm indices obtained before angioplasty five postangioplasty improvement five.

10.1148/radiology.149.2.6226059 article EN Radiology 1983-11-01

To compare the overall survival (OS) and liver cancer-specific of advanced-stage hepatocellular carcinoma (HCC) patients who received transarterial radioembolization (TARE) with those nonoperative/interventional treatment (NOT).A total 12,520 HCC from Surveillance, Epidemiology End Results database were categorized by either or NOT. Kaplan-Meier multivariate Cox regression conducted.The TARE group had both a significantly longer median than NOT (TARE = 9 months; 2 p < 0.0001) higher...

10.2217/cer-2017-0064 article EN Journal of Comparative Effectiveness Research 2018-03-19

The OnControl coaxial biopsy system (Vidacare Corporation, Shavano Park, TX) includes an inner diamond-tipped access needle and hollow that engage with a battery-powered hand drill. Herein, we report the use of this novel device to perform two CT-guided percutaneous skull biopsies. Both procedures were performed without complication facilitated pathologic diagnosis.

10.1177/1591019915609172 article EN Interventional Neuroradiology 2015-10-27

This article has been withdrawn at the request of author(s) and/or editor. The Publisher apologizes for any inconvenience this may cause. full Elsevier Policy on Article Withdrawal can be found http://www.elsevier.com/locate/withdrawalpolicy.

10.1016/j.ensci.2016.02.007 article EN cc-by-nc-nd eNeurologicalSci 2016-02-01

In pediatric patients, the pelvic and abdominal contents of hernias canal Nuck have increased risk strangulation. Early diagnosis these with ultrasonography is important. We report a case hernia presented as left inguinal mass containing ipsilateral ovary in 26-day-old premature infant girl.&nbsp

10.5070/rs42346673 article EN cc-by The UCLA Radiological Science Proceedings 2022-07-19

10.1016/j.jvir.2015.12.357 article EN Journal of Vascular and Interventional Radiology 2016-03-01

Soft tissue calcifications are a common imaging finding, but in the setting of cosmetic augmentative injection and hypercalcemia, it may be pathognomonic for lipogranuloma, delayed granulomatous inflammatory reaction to injected foreign material. Although diagnosis lipogranuloma is based on results histopathologic examination, radiologist play key role clinical evaluation challenging cases when patients do not report about nonmedical procedures. If treatment granulomatosis-induced...

10.5070/rs43453252 article EN cc-by The UCLA Radiological Science Proceedings 2023-10-29
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