scholarly journals Numerical Analysis of the Localization of Pulmonary Nodules during Thoracoscopic Surgery by Ultra-Wideband Radio Technology

2021 ◽  
Vol 11 (9) ◽  
pp. 4282
Author(s):  
Alberto Battistel ◽  
Peter Paul Pott ◽  
Knut Möller
Keyword(s):  
Numerical Analysis ◽  
Thoracoscopic Surgery ◽  
Pulmonary Nodules ◽  
Ultra Wideband ◽  
Solitary Pulmonary Nodules ◽  
Extensive Discussion ◽  
Common Causes ◽  
Radio Technology ◽  
Uwb Radio ◽  
5 Ghz

Worldwide, lung cancer is one of the most common causes of cancer-related death. Detected by computer tomography, it is usually removed through thoracoscopic surgery. During the surgery the lung collapses requiring some strategies to track or localize the new position of the lesion. This is particularly challenging in the case of minimally invasive surgeries when mechanical palpation is not possible. Here we undertake a preliminary study with numerical analysis of an ultra-wideband (UWB) radio technology which can be employed directly during thoracoscopic surgery to localize deep solitary pulmonary nodules. This study was conducted through Finite Difference Time Domain (FDTD) simulations, where a spherical target mimicking a nodule located between 1 and 6 cm of depth and an UWB pulse at several frequencies between 0.5 and 5 GHz was used for localization. This investigation quantifies the influence of several parameters, such frequency, lesion depth, and number of acquisitions, on the final confocal image used to locate a cancer in the lung tissue. We also provide extensive discussion on several artifacts that appear in the images. The results show that the cancer localization was possible at operational frequencies below 1 GHz and for deep nodules (>5 cm), while at lower depths and higher frequencies several artifacts hindered its detection.

scholarly journals Ultra-Wideband Localization of Pulmonary Nodules during Thoracoscopic Surgery

2021 ◽  
Vol 6 (1) ◽  
pp. 4
Author(s):  
Alberto Battistel ◽  
Knut Möller
Keyword(s):  
Minimally Invasive ◽  
Lung Tissue ◽  
Pulmonary Nodule ◽  
Electromagnetic Waves ◽  
Thoracoscopic Surgery ◽  
Pulmonary Nodules ◽  
Ultra Wideband ◽  
Invasive Approach ◽  
Radio Technology ◽  
Uwb Radio

Lung cancer is one of the most common causes of cancer-related death worldwide. It is usually detected by CT or MRI and removed through thoracoscopic surgery. However, during surgery, the lung collapses, and a new determination of the position of the pulmonary nodule is necessary, which is particularly challenging in the case of minimally invasive surgeries when palpation is not possible. In this contribution, ultra-wideband (UWB) radio technology, which employs a short burst of high-frequency electromagnetic waves, is studied to localize the pulmonary nodule. In short, an antenna in close proximity with the lung surface produces a signal, and the echo emanating from discontinuities in the lung tissue, i.e., the pulmonary nodule, can be used for the localization. A similar approach has already been proposed for breast cancer. Simulations were used to explore the relationship between frequency range and penetration depth and showed that shallow nodules, below 2 cm in depth, are difficult to resolve because the echo directly interferes with the propagating signal. On the other hand, given the strong electromagnetic attenuation of lung tissue, echo emanating from near organs is suppressed, and frequency-band tuning can be employed to range the depth of the investigation. Ultimately, this contribution shows how to employ and design UWB technology to localize deep pulmonary nodules through a minimally invasive approach.

Characteristics of benign solitary pulmonary nodules confirmed by diagnostic video-assisted thoracoscopic surgery

2014 ◽  
Vol 10 (2) ◽  
pp. 181-188 ◽  
Author(s):  
Sun Mi Choi ◽  
Eun Young Heo ◽  
Jinwoo Lee ◽  
Young Sik Park ◽  
Chang-Hoon Lee ◽  
...  
Keyword(s):  
Thoracoscopic Surgery ◽  
Pulmonary Nodules ◽  
Solitary Pulmonary Nodules ◽  
Video Assisted ◽  
Video Assisted Thoracoscopic Surgery

CCS: A Railway Corridor Control System Utilizing Ultra Wideband Radio Technology

Joint Rail ◽  
2004 ◽  
Author(s):  
Paul A. Flaherty
Keyword(s):  
Wireless Local Area Network ◽  
Local Area Network ◽  
Linear Chain ◽  
Wide Band ◽  
Local Area ◽  
Ultra Wideband ◽  
Area Network ◽  
Radio Technology ◽  
A Chain ◽  
Uwb Radio

Ultra Wide Band (UWB) radio is a unique technology which combines a megabit wireless local area network with a centimeter-resolution radiolocation (RADAR) capability over distances less than 100 meters. A linear chain of UWB nodes can be used to create a hop-by-hop data transmission network, which also forms a RADAR “corridor” along the chain. By co-locating such a chain of nodes along a railroad right-of-way, precise information on the location and velocity of trains could be distributed throughout the corridor. In addition, the radar corridor would detect the introduction of track obstacles such as rocks, people, and automobiles, as well as shifted loads and other high-wide train defects. Finally, the network of nodes would enable off-train communications with payload sensors, locomotive computers, and could also provide wireless connectivity for passenger service.

scholarly journals Clinical Analysis of Video-Assisted Thoracoscopic Surgery for Resection of Solitary Pulmonary Nodules and Influencing Factors in the Diagnosis of Benign and Malignant Nodules

2021 ◽  
Vol 2021 ◽  
pp. 1-7
Author(s):  
Hongxu Yue ◽  
Kaijie Fan ◽  
Zhimin Zhang ◽  
Yang Liu
Keyword(s):  
Single Port ◽  
Thoracoscopic Surgery ◽  
Pulmonary Nodules ◽  
Operation Time ◽  
Maximum Diameter ◽  
Imaging Features ◽  
Solitary Pulmonary Nodules ◽  
Serious Adverse Events ◽  
Video Assisted ◽  
Surgical Methods

Purpose. This is a retrospective research comparing the clinical outcomes of single-hole versus multi-hole video-assisted thoracoscopic surgical (VATS) resection for solitary pulmonary nodules (SPN) and examining the factors influencing the diagnosis of benign and malignant pulmonary nodules. Method. We collected the clinical data, surgical status, outcomes, and corresponding imaging features of 317 patients with SPN who were surgically resected by VATS and diagnosed as benign or malignant by pathology in our hospital from January 2019 to December 2021. Result. Among the 317 patients, 124 (39.12%) underwent single-port VATS and 193 (60.88%) underwent multiple-hole VATS. All patients were grouped according to the different surgical methods, and their postoperative indicators were statistically analyzed. The results showed that neither the single-port VATS group nor the multi-port VATS group had any serious adverse events such as death during the perioperative period. The average operation time, intraoperative blood loss, drainage tube indwelling time, and postoperative hospital stay were significantly lower in the two groups. Statistics of postoperative pathological diagnosis showed that 98 cases (30.91%) of all nodules were benign nodules and 219 cases (69.09%) were malignant nodules, and a further single-multivariate analysis showed that age, nodule maximum diameter, lobular sign, burr sign, vascular cluster sign, and pleural depression sign were independent relevant factors for the diagnosis of benign and malignant nodules. Conclusion. VATS is less invasive and has fewer complications and is of great clinical value for both diagnosis and treatment of benign and malignant SPN. Age, maximum nodal diameter, lobar sign, burr sign, vascular set sign, and pleural depression sign were independent correlates affecting the diagnosis of benign and malignant SPN, which reminds that great attention should be paid to patients who are older and have risk factors on imaging, and early and timely active treatment or close follow-up should be carried out.

Impact of Video-Assisted Thoracoscopic Surgery on Benign Resections for Solitary Pulmonary Nodules

2012 ◽  
Vol 93 (1) ◽  
pp. 266-273 ◽  
Author(s):  
Elbert Kuo ◽  
Ankit Bharat ◽  
Nicholas Bontumasi ◽  
Czarina Sanchez ◽  
Jennifer Bell Zoole ◽  
...  
Keyword(s):  
Thoracoscopic Surgery ◽  
Pulmonary Nodules ◽  
Solitary Pulmonary Nodules ◽  
Video Assisted ◽  
Video Assisted Thoracoscopic Surgery
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