Technical Note: A simple method for measuring the slice sensitivity profile of iteratively reconstructed CT images using a non‐slanted edge plane

2020 ◽  
Author(s):  
Akihiro Narita ◽  
Masaki Ohkubo ◽  
Takahiro Fukaya ◽  
Yoshiyuki Noto
Keyword(s):  
Ct Images ◽  
Technical Note ◽  
Simple Method ◽  
Slice Sensitivity Profile ◽  
Sensitivity Profile

Technical Note: Robust measurement of the slice-sensitivity profile in breast tomosynthesis

2016 ◽  
Vol 43 (8Part1) ◽  
pp. 4803-4807 ◽  
Author(s):  
Aili K. Maki ◽  
James G. Mainprize ◽  
Martin J. Yaffe
Keyword(s):  
Technical Note ◽  
Breast Tomosynthesis ◽  
Slice Sensitivity Profile ◽  
Sensitivity Profile

scholarly journals A Simple Method to Avoid Brain Shift during Neuronavigation: Technical Note

2020 ◽  
Author(s):  
Jair Leopoldo Raso
Keyword(s):  
Dura Mater ◽  
Brain Area ◽  
Conventional Technique ◽  
Technical Note ◽  
Cortical Surface ◽  
Brain Shift ◽  
Simple Method ◽  
Cortex Area ◽  
Neuronavigation System ◽  
The Brain

Abstract Introduction The precise identification of anatomical structures and lesions in the brain is the main objective of neuronavigation systems. Brain shift, displacement of the brain after opening the cisterns and draining cerebrospinal fluid, is one of the limitations of such systems. Objective To describe a simple method to avoid brain shift in craniotomies for subcortical lesions. Method We used the surgical technique hereby described in five patients with subcortical neoplasms. We performed the neuronavigation-guided craniotomies with the conventional technique. After opening the dura and exposing the cortical surface, we placed two or three arachnoid anchoring sutures to the dura mater, close to the edges of the exposed cortical surface. We placed these anchoring sutures under microscopy, using a 6–0 mononylon wire. With this technique, the cortex surface was kept close to the dura mater, minimizing its displacement during the approach to the subcortical lesion. In these five cases we operated, the cortical surface remained close to the dura, anchored by the arachnoid sutures. All the lesions were located with a good correlation between the handpiece tip inserted in the desired brain area and the display on the navigation system. Conclusion Arachnoid anchoring sutures to the dura mater on the edges of the cortex area exposed by craniotomy constitute a simple method to minimize brain displacement (brain-shift) in craniotomies for subcortical injuries, optimizing the use of the neuronavigation system.

scholarly journals Technical Note: Automatic segmentation of CT images for ventral body composition analysis

2020 ◽  
Vol 47 (11) ◽  
pp. 5723-5730
Author(s):  
Yabo Fu ◽  
Joseph E. Ippolito ◽  
Daniel R. Ludwig ◽  
Rehan Nizamuddin ◽  
Harold H. Li ◽  
...  
Keyword(s):  
Body Composition ◽  
Automatic Segmentation ◽  
Ct Images ◽  
Technical Note ◽  
Composition Analysis ◽  
Body Composition Analysis

scholarly journals Technical Note: A simple method for preparing reference slides of seed.

2006 ◽  
Vol 54 (2) ◽  
Author(s):  
M.A. Dacar ◽  
S.M. Giannoni
Keyword(s):  
Technical Note ◽  
Simple Method

Minimally Invasive Echo-Guided Placement Of The Cardiac Tube In A Ventriculoatrial Shunt During Pregnancy: Technical Note

2007 ◽  
Vol 61 (suppl_5) ◽  
pp. ONSE398-ONSE398
Author(s):  
Licia Di Muro ◽  
Roberto Pallini ◽  
Domenico Pietrini ◽  
Christian Colizzi ◽  
Luca Denaro
Keyword(s):  
Minimally Invasive ◽  
Internal Jugular Vein ◽  
Right Atrium ◽  
Jugular Vein ◽  
Technical Note ◽  
Invasive Technique ◽  
Success Rates ◽  
Ventriculoatrial Shunt ◽  
Simple Method ◽  
Sonographic Guidance

Abstract Objective: We describe a minimally invasive echo-guided placement of the cardiac tube in a ventriculoatrial shunt in a young pregnant woman, in order to avoid any radiological procedure. Methods: We used a central venous catheter placement kit for percutaneous echo-guided right internal jugular vein puncture located by a 7.5 mHz microlinear probe. Through the catheter, the distal portion of the shunt device was positioned into the internal jugular vein to the right atrium using ultrasound control by a 2.5 to 3.5 mHz probe in a four-chamber transthoracic view. Results: Sonographic guidance in percutaneous placement of a vertebral artery shunt is a safe and fast minimally invasive technique that improves success rates and decreases complications such as incidental puncture of the carotid artery and pneumothorax. The use of a two-dimensional echocardiographic apparatus in a four-chamber transthoracic view is an accurate and simple method to verify the position of the distal tip of the shunt in the mid-right atrium with no risks for the patient. Conclusion: The use of these two techniques allows a minimally invasive, safe, accurate, and complete x-ray-free procedure.

Technical Note. Do Arterial Phase Helical CT Images Improve Detection or Characterization of Colorectal Liver Metastases?

1997 ◽  
Vol 21 (3) ◽  
pp. 391-397 ◽  
Author(s):  
Ian Y. Ch'en ◽  
Douglas S. Katz ◽  
R. Brooke Jeffrey ◽  
Bruce L. Daniel ◽  
King C. P. Li ◽  
...  
Keyword(s):  
Liver Metastases ◽  
Colorectal Liver Metastases ◽  
Helical Ct ◽  
Ct Images ◽  
Technical Note ◽  
Arterial Phase

Technical Note A Simple Method for Reproducing Polaroid Images as Transparencies

1977 ◽  
Vol 1 (1) ◽  
pp. 161-162
Author(s):  
Lawrence R. Kuhns ◽  
Timothy Zeddies ◽  
Allan J. Martin
Keyword(s):  
Technical Note ◽  
Simple Method

Competing Front for Directed Surface Extraction from CT Images

2012 ◽  
Vol 195-196 ◽  
pp. 534-538
Author(s):  
Xue Shu Liu
Keyword(s):  
Level Set Method ◽  
Level Set ◽  
Ct Images ◽  
Experimental Results ◽  
Second Step ◽  
Simple Method ◽  
Zero Level ◽  
Interior Surface ◽  
Surface Extraction ◽  
Speed Function

Outward directed surface extraction from imaging modalities is the first task in the design of implants. In this paper a method based on level set method is proposed to extract the directed surface from CT images. The process is composed of two steps. In the first step, Level Set method with a new speed function is employed to evolve zero level set to its destination and used to cut the desired bone part from the input CT images. In the second step, a simple method is used to extract the directed surface, usually the outward surface, from the separated bone part by removing the interior surface. The experimental results show the proposed method works well.

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