Herman Alexander Jaeger

Verified

Herman verified their affiliation via an institutional email.

Learn more

Verified

Herman verified their affiliation via an institutional email.

Learn more

• PhD
• Lecturer at University College Cork

In this work, we introduce a cost-effective device for lung navigation, utilizing magnetic sensor technology. Traditional electromagnetically tracked devices often rely on wire-wound coil sensors [1]. However, by employing an on-chip solution with a compact sensor area of just 1.06 mm², we significantly reduce the cost of disposable medical devices...

This paper presents a compact and low-cost on-chip sensor and readout circuit. The sensor achieves high-resolution 5-degrees-of-freedom (DoF) tracking (x, y, z, yaw, and pitch). With the help of an external wire wound sensor, it can also achieve high-resolution 6-degrees-of-freedom (DoF) tracking (x, y, z, yaw, pitch, and roll angles). The sensor u...

Electromagnetic tracking is essential in surgical navigation without line of sight and to reduce use of harmful radiation-based imaging. The inductive sensors used in current electromagnetic tracking systems are small, often less than a millimetre in diameter, but the need for a wired connection from the sensor to the control unit can cause obstruc...

In this paper, a planar on-silicon inductor design for electromagnetic tracking is presented. The design process has been demonstrated for a planar sensing coil in a 65 nm on-silicon process. The designed multilayer planar inductor configuration achieves SNR of 23.6 dB and sensitivity of 202 μ V/T/Hz . The designed inductor satisfies system re...

Electromagnetic tracking (EMT) of surgical tools is used for image-guided navigation in minimally invasive interventions. Calibration of the tracker position and orientation is a fundamental task to correct systematic errors. This article explores the effect of metallic distortion on the open hardware Anser EMT system and describes a newly develope...

In this paper, a planar on-silicon inductor design optimization for electromagnetic tracking is presented. The optimization process has been demonstrated for a planar sensing coil in a 65 nm on-silicon process. The optimized multilayer planar inductor configuration achieves SNR of 23.6 dB and sensitivity of 202 µV/T/Hz. The designed inductor satisf...

Electromagnetic tracking (EMT) of surgical tools is used for image-guided navigation in minimally invasive interventions. Calibration of the tracker position and orientation is a fundamental task to correct systematic errors. In this article, we explore the effect of metallic distortion on the open hardware Anser EMT system, and we describe a newly...

Electromagnetic tracking is a navigation technology used for guided medical interventions. The technology is seeing increased uptake in applications including robotic surgery, catheter navigation and human-machine interface design. Medical devices incorporating small magnetic sensors enable live tracking of the device's position and orientation. Th...

Induction sensors play an important role in acheiv-ing high position and orientation accuracy in electromagnetic tracking systems. This paper demonstrates a systematic method for characterising inductive coil sensors over a broad range of magnetic field strengths. The demonstrated system is capable of generating low frequency magnetic fields across...

This work explores how the Electromagnetic Tracking Systems (EMTS) can be merged with accelerometer data to detect and correct for metallic distortion in the operating room. Large metal structures in medical environments distort the magnetic fields used for navigation and cause errors in the reported positions. By merging magnetic measurements and...

Magnetic tracking enables instrument tracking for image-guided interventions when no line of sight is available. This paper describes the first steps towards a more cost-effective, modular, and adaptable approach that builds upon prior work in open hardware architectures for magnetic tracking in image-guided interventions. An exemplary C++ framewor...

Electromagnetic tracking and navigation of tools is an essential element of image-guided interventions. However, most of the existing tracking systems use wired sensors for data collection, processing and tracking. This work focuses on the development of a Bluetooth-based wireless electromagnetic tracking system. Preliminary results show real-time...

In recent times, the use of electromagnetic tracking for navigation in surgery has quickly become a vital tool in minimally invasive surgery. In many procedures, electromagnetic tracking is used in tandem with X-ray technology to track a variety of tools and instruments. Most commercially available EM tracking systems can cause X-ray artifacts and...

Electromagnetic tracking is a safe, reliable, and cost-effective method to track medical instruments in image-guided surgical navigation. However, patient motion and magnetic field distortions heavily impact the accuracy of tracked position and orientation. The use of redundant magnetic sensors can help to map and mitigate for patient movements and...

Electromagnetic tracking (EMT) is a safe, reliable, and cost-effective method to track medical instruments in image-guided navigation. However, magnetic field distortions heavily impact on the accuracy of the tracked position and orientation. We propose a fast and accurate analytical formulation for the calculus of the mutual coupling between a new...

https://player.vimeo.com/video/486551735

https://i2mtc2020.ieee-ims.org/sites/i2mtc20/files/2020-05/I2MTC%202020_Program_WEB_0.pdf

Introduction: The aims of this study were to test a novel simulation platform suitable for flexible cystoscopy using a standard scope, to assess the platform's proposed use as a training tool for flexible cystoscopy, and to assess the user experience through surveyed response. Methods: Thirty-one urologists (11 novices, 20 experts) were evaluate...

As the importance and prevalence of electromagnetic tracking in medical and industrial applications increases, the need for customized sensor design has escalated. This work focuses on AC-based electromagnetic tracking systems where off-the-shelf inductive sensors may not be optimal for many medical instruments or tracking applications. We present...

Introduction: Colonoscopy is the routine procedure used for colorectal cancer screening and prevention. In clinical practice, clinicians mark a potential tumor with ink-based tattoo. The objective of this work is to find an alternative to tattooing for endoscopic marking of colon polyps and tumors prior to surgery. Electromagnetic tracking is alre...

As the importance and prevalence of electromagnetic tracking in medical and industrial applications increases, the need for customised sensor design has escalated. This work focuses on AC-based electromagnetic tracking systems where off-the-shelf inductive sensors may not be optimal for many medical instrument or tracking applications. A repeatable...

Purpose Electromagnetic tracking is a core platform technology in the navigation and visualisation of image-guided procedures. The technology provides high tracking accuracy in non-line-of-sight environments, allowing instrument navigation in locations where optical tracking is not feasible. EMT can be beneficial in applications such as percutaneou...

Introduction. The goal of this work study was to test a novel simulation platform suitable for flexible cystoscopy using a standard scope, to assess the platform's proposed use as a training tool for flexible cystoscopy, and assessing the user experience through surveyed response. Methods. To ensure the highest quality of care, competence in flex...

Purpose: Electromagnetic tracking is a core platform technology in the navigation and visualisation of image-guided procedures. The technology provides high tracking accuracy in non-line-of-sight environments, allowing instrument navigation in locations where optical tracking is not feasible. EMT can be beneficial in applications such as percutaneo...

Electromagnetic tracking (EMT) systems play an important role in medicine, robotics, and virtual reality applications by providing accurate position and orientation referencing within a fixed volume around a magnetic field generator. Advances in sensor technology provide increasingly small, lightweight sensors capable of being integrated into hand-...

Image-guided Interventions (IGT) have shown a huge potential to improve medical procedures or even allow for new treatment options. Most ultrasound(US)-based IGT systems use electromagnetic (EM) tracking for localizing US probes and instruments. However, EM tracking is not always reliable in clinical settings because the EM field can be disturbed b...

Percutaneous needle-based procedures such as radiofrequency ablation (RFA) and electrochemotherapy are becoming more prevalent in the treatment of hep-atocellular carcinoma [6][3]. Ultrasound is a common imaging modality used in RFA, and numerous studies have demonstrated its effectiveness in treating shallow or superficial hepatic lesions (> 2cm)...

The aim of this work is to enable a paradigm shift in the diagnosis and treatment of lung cancer through the development of a novel range of new steerable instruments which can demonstrate the dexterity and steerability of laparoscopic devices at the endoscopic scale (2-4 mm). Existing minimally invasive diagnosis modalities are overly reliant on r...

Image-guided Interventions (IGT) have shown a huge potential to improve medical procedures or even allow for new treatment options. Most ultrasound(US)-based IGT systems use electromagnetic (EM) tracking for localizing US probes and instruments. However, EM tracking is not always reliable in clinical settings because the EM field can be disturbed b...

Objectives: The goal was to demonstrate the utility of open-source tracking and visualisation tools in the targeting of lung cancer. Material and methods: The study demonstrates the first deployment of the Anser electromagnetic (EM) tracking system with the CustusX image-guided interventional research platform to navigate using an endobronchial...

Objective: The goal of this work was to demonstrate technical feasibility of automated balloon pressure management during REBOA in the pre-clinical setting. Methods: This paper presents an intelligent balloon management device which automates the balloon inflation process, preventing the possibility of balloon over or under inflation, optimizes...

Electromagnetic tracking (EMT) is a core platform technology in the navigation and visualisation of image-guided procedures. The technology provides high tracking accuracy in non-line-of-sight environments, allowing instrument navigation in locations where optical tracking is not feasible. Integration of EMT in complex procedures, often coupled wit...

Electromagnetic tracking (EMT) is playing an increasingly important role in surgical navigation, medical robotics and virtual reality development as a positional and orientation reference. Though EMT is not restricted by line-of-sight requirements, measurement errors caused by magnetic distortions in the environment remain the technology’s principa...

Electromagnetic tracking (EMT) is a core platform technology in the navigation and visualisation of image-guided procedures. The technology provides high tracking accuracy in non-line-of-sight environments, allowing instrument navigation in locations where optical tracking is not feasible. Integration of EMT in complex procedures, often coupled wit...

Objectives. To test a novel tool suitable for flexible cystoscopy using a standard scope with a view to quantifying competency in flexible cystoscopy. Materials and Methods. To ensure the highest quality of care, competency in flexible cystoscopy should be quantifiably measured. Commercial simulators are often unused outside of teaching hospitals d...

Lung cancer remains the single most deadly cancer in men and women due to low rates of early detection and treatment. Since non-small cell lung cancer usually starts in the outer airways, targeted minimally invasive biopsy which limits radiation exposure and avoids surgery is highly desirable. Current commercial solutions such as the superDimension...

Electromagnetic tracking is an increasingly important enabling technology in image-guided surgery where it is often used in combination with fluoroscopy. In this work, we compare the performance of two electromagnetic tracking platforms, Anser EMT and NDI Aurora, within the hybrid imaging environment. Results indicate that the Aurora system, while...

Bronchoscopy has long been a key tool in diagnosing the nature of pulmonary lesions. Unfortunately, the diagnostic yield of the procedure varies widely based on the size and the location of the nodule, from 82% in central regions to 53% in the periphery. Lesions smaller than 2cm located in the periphery of the lung showed yields as low as 14%. Whil...

Electromagnetic tracking (EMT) is a common navigation technology used in image guided applications. EMT is particularly useful in procedures where line-of-sight of the operating field is not feasible. We present a major update of the open source electromagnetic tracking platform Anser EMT [1] and present its results when performing bronchoscopy in...

Non-compressible torso hemorrhage is a major cause of preventable death from trauma in civilian and military populations [1]. Resuscitative endovascular balloon occlusion of the aorta (REBOA) is a minimally invasive procedure to increase blood pressure to the brain in such cases. A balloon catheter is inserted through the femoral artery, often perc...

This paper describes a novel method of controlling an endoscopic catheter using an automated catheter tensioning system with the objective of providing clinicians with improved manipulation capabilities within the patient. Catheters are used in many clinical procedures to provide access to the cardiopulmonary system. Control of such catheters is pe...

Purpose: Electromagnetic tracking is the gold standard for instrument tracking and navigation in the clinical setting without line of sight. Whilst clinical platforms exist for interventional bronchoscopy and neurosurgical navigation, the limited flexibility and high costs of electromagnetic tracking (EMT) systems for research investigations mitig...

Purpose: Lung cancer still represents the leading cause of cancer-related death, and the long-term survival rate remains low. Computed tomography (CT) is currently the most common imaging modality for lung diseases recognition. The purpose of this work was to develop a simple and easily accessible virtual bronchoscopy system to be coupled with a c...

Background: Radiopaque markers and soft tissue models have been used extensively in clinical applications to target cancerous lesions and to calibrate and characterize imaging systems. However, the development of radiopaque, soft tissue models for pulmonary lesions is yet to be optimized. Such a material may improve endoscopic training techniques...

Peripheral lung nodules remain challenging for accurate localization and diagnosis. Once identified, there are many strategies for diagnosis with heterogeneous risk benefit analysis. Traditional strategies such as conventional bronchoscopy have poor performance in locating and acquiring the required tissue. Similarly, while computerized-assisted tr...

In order to assist in the identification of renal vasculature and tumour boundaries in robot-assisted partial nephrectomy, robust ultrasound probe calibration and tracking methods are introduced. Contemporaneous image guidance during these crucial stages of the procedure should ultimately lead to improved safety and quality of outcome for the patie...