Wilson Chang

Learn More
OBJECTIVE Retrobulbar and peribulbar injections are common ophthalmologic procedures used to deliver anesthetics and other medications for ophthalmic therapy and surgery. These injections, typically performed without any type of guidance, can lead to complications that are rare but visually devastating. The needle may penetrate the optic nerve, perforate(More)
OBJECTIVE The Sonic Flashlight (SF) is a new handheld ultrasound (US) display device being developed at our institution. It replaces the standard monitor on a conventional ultrasound (CUS) system with a miniature monitor and half-silvered mirror to reflect real-time US images into the body. With the SF, the imaged body part appears translucent, with the US(More)
PURPOSE To prospectively evaluate whether ultrasonography (US)-guided vascular access can be learned and performed faster with the sonic flashlight than with conventional US and to demonstrate sonic flashlight-guided vascular access in a cadaver. MATERIALS AND METHODS Institutional review board approval and oral and written informed consent were obtained.(More)
The Sonic Flashlight is an ultrasound (US) device that projects real-time US images into patients with use of a semireflective/transparent mirror. The present study evaluated the feasibility of use of the Sonic Flashlight for clinical peripherally inserted central catheter placements, originally with the mirror located inside a sterile cover (n = 15), then(More)
RATIONALE AND OBJECTIVES Real-time tomographic reflection (RTTR) permits in situ visualization of tomographic images so that natural hand-eye coordination can be used directly during invasive procedures. The method uses a half-silvered mirror to merge the visual outer surface of the patient with a simultaneous scan of the patient's interior without(More)
From the discovery of X-rays over a century ago, clinicians have been presented with a wide assortment of imaging modalities yielding maps of localized structure and function within the patient. Some imaging modalities are <i>tomographic</i>, meaning that the data are localized into voxels, rather than projected along lines of sight as with conventional(More)
We have previously shown a new method of merging a direct view of the patient with an ultrasound image displayed in situ within the patient, using a half-silvered mirror. We call this method Real Time Tomographic Reflection (RTTR). This paper reviews our progress to date in developing an embodiment of RTTR that we call the sonic flashlight . The clinical(More)
Ultrasound (US) is often used in interventional procedures such as accessing blood vessels, performing biopsies, and placing drains. The Sonic Flashlight (SF) is a handheld device that uses a mirror to reflect a real-time US image into the body, making that body part appear translucent. The latest generation handheld SF has been improved to the point where(More)
  • 1