Evaluation of the Accuracy of 3-Dimensional Ultrasonography of the Kidney Using an In Vitro Renal Model

John, Babbin; Rowland, David; Patel, Uday; Pilcher, James; Anson, Ken; Nassiri, D. K.

doi:10.7863/jum.2009.28.2.155

Cited by 5 publications

(3 citation statements)

References 24 publications

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“…In the pioneer study in [23], the authors determined the feasibility and accuracy of 3D US reconstruction of the pelvicaliceal system (PCS) in an in vitro porcine kidney. A further study in [24] has demonstrated that 3D US is more accurate than 2D US for PCS measurements on a customized phantom. The authors in [24] then performed 3D US-guided punctures on that phantom and proved the feasibility.…”

Section: Resultsmentioning

confidence: 99%

“…A further study in [24] has demonstrated that 3D US is more accurate than 2D US for PCS measurements on a customized phantom. The authors in [24] then performed 3D US-guided punctures on that phantom and proved the feasibility. Therefore, it is a nature idea that the accuracy and repeatability would be improved further by intruding a 3D US system into our guidance framework.…”

Section: Resultsmentioning

confidence: 99%

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Augmenting intraoperative ultrasound with preoperative magnetic resonance planning models for percutaneous renal access

Zhan

et al. 2012

BioMedical Engineering OnLine

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BackgroundUltrasound (US) is a commonly-used intraoperative imaging modality for guiding percutaneous renal access (PRA). However, the anatomy identification and target localization abilities of the US imaging are limited. This paper evaluates the feasibility and efficiency of a proposed image-guided PRA by augmenting the intraoperative US with preoperative magnetic resonance (MR) planning models.MethodsFirst, a preoperative surgical planning approach is presented to define an optimal needle trajectory using MR volume data. Then, a MR to US registration is proposed to transfer the preoperative planning into the intraoperative context. The proposed registration makes use of orthogonal US slices to avoid local minima while reduce processing time. During the registration, a respiratory gating method is used to minimize the impact of kidney deformation. By augmenting the intraoperative US with preoperative MR models and a virtual needle, a visual guidance is provided to guarantee the correct execution of the surgical planning. The accuracy, robustness and processing time of the proposed registration were evaluated by four urologists on human data from four volunteers. Furthermore, the PRA experiments were performed by the same four urologists on a kidney phantom. The puncture accuracy in terms of the needle-target distance was measured, while the perceptual quality in using the proposed image guidance was evaluated according to custom scoring method.ResultsThe mean registration accuracy in terms of the root mean square (RMS) target registration error (TRE) is 3.53 mm. The RMS distance from the registered feature points to their average is 0.81 mm. The mean operating time of the registration is 6'4". In the phantom evaluation, the mean needle-target distance is 2.08 mm for the left lesion and 1.85 mm for the right one. The mean duration for all phantom PRA tests was 4'26". According to the custom scoring method, the mean scores of the Intervention Improvement, Workflow Impact, and Clinical Relevance were 4.0, 3.3 and 3.9 respectively.ConclusionsThe presented image guidance is feasible and promising for PRA procedure. With careful setup it can be efficient for overcoming the limitation of current US-guided PRA.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Augmenting intraoperative ultrasound with preoperative magnetic resonance planning models for percutaneous renal access

Zhan

et al. 2012

BioMedical Engineering OnLine

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“…Gelatin-based phantoms have been described for developing ultrasound-guided biopsy technique [3,4], but these do not facilitate the complex procedural sequence required to insert a drain into a dilated pelvicalyceal system. A gelatin-based system has recently been described that allows ultrasound-guided puncture of a simulated pelvicalyceal system [5], but the costs and complexity of production may be prohibitive for routine use by trainees. We therefore describe a cheap and relatively simple technique, adapted from previously described methodology [3,4], for producing a gelatinbased phantom that permits ultrasound-guided puncture, wire insertion, serial dilatation and drainage of a fluid-filled cavity that simulates the dilated collecting system of a hydronephrotic kidney.…”

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confidence: 99%

A training simulator for ultrasound-guided percutaneous nephrostomy insertion

Rock¹,

Leonard²,

Freeman³

2010

BJR

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ABSTRACT. Increasing trainee numbers and changes to working patterns have resulted in a scarcity of training opportunities for training-grade doctors wishing to learn nephrostomy tube insertion techniques. A method of introducing trainees to the skills required to perform percutaneous nephrostomy in a safe, non-threatening environment, without risk to patients, is desirable. Commercial and biological nephrostomy phantoms are available, but they are expensive and not widely available, and a cheap, safe, valid alternative is desirable. We describe a simple technique for producing a gelatin-based phantom, which we suggest has face and content simulator validity. The use of this nephrostomy phantom could optimise existing clinical training opportunities through familiarisation with nephrostomy technique and equipment, and development of the psychomotor skills required for successful nephrostomy insertion prior to undertaking supervised procedures on patients. Skills in ultrasound-guided percutaneous nephrostomy insertion are desirable for trainee radiologists. Nephrostomy is often the method of choice for emergency decompression of an obstructed renal system, particularly in the presence of urinary infection. This intervention is frequently required as an "on-call" procedure. Moreover, the skills required for ultrasound needle guidance and the Seldinger technique are crosstransferable, being of use in the drainage of collections elsewhere in the body and in the performance of ultrasound-guided biopsies. Preferably, trainees should acquire these skills in a safe, non-threatening environment, without patient risk.Commercial nephrostomy phantoms are available and biological phantoms have been described [1,2], but both of these have disadvantages (including cost and hygiene considerations, respectively). Gelatin-based phantoms have been described for developing ultrasound-guided biopsy technique [3,4], but these do not facilitate the complex procedural sequence required to insert a drain into a dilated pelvicalyceal system. A gelatin-based system has recently been described that allows ultrasound-guided puncture of a simulated pelvicalyceal system [5], but the costs and complexity of production may be prohibitive for routine use by trainees. We therefore describe a cheap and relatively simple technique, adapted from previously described methodology [3,4], for producing a gelatinbased phantom that permits ultrasound-guided puncture, wire insertion, serial dilatation and drainage of a fluid-filled cavity that simulates the dilated collecting system of a hydronephrotic kidney.

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Simulation in Radiology: Diagnostic Techniques

Towbin

2013

The Comprehensive Textbook of Healthcare Simulation

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Evaluation of the Accuracy of 3-Dimensional Ultrasonography of the Kidney Using an In Vitro Renal Model

Cited by 5 publications

References 24 publications

Augmenting intraoperative ultrasound with preoperative magnetic resonance planning models for percutaneous renal access

Augmenting intraoperative ultrasound with preoperative magnetic resonance planning models for percutaneous renal access

A training simulator for ultrasound-guided percutaneous nephrostomy insertion

Simulation in Radiology: Diagnostic Techniques

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