Real-time 3D transesophageal echocardiography

Pua, Eric C.; Idriss, Salim F.; Wolf, Patrick D.; Smith, Stephen W.

doi:10.1109/ultsym.2004.1417837

Cited by 19 publications

(19 citation statements)

References 5 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Fig. 7 shows the comparison of the experimental spectral Doppler data (dotted line) and the calculated FFT model data (solid line) using the transverse displacement data from (16) for the distributed force case. The y-axis shows the normalized frequency spectrum maximum value, and the x-axis is the needle length, with the free end at the right.…”

Section: Resultsmentioning

confidence: 99%

See 1 more Smart Citation

Analysis of a Vibrating Interventional Device to Improve 3-D Colormark Tracking

Fronheiser

Smith

2007

IEEE Trans. Ultrason., Ferroelect., Freq. Contr.

View full text Add to dashboard Cite

Abstract-Ultrasound guidance of interventional devices during minimally invasive surgical procedures has been investigated by many researchers. Previously, we extended the methods used by the Colormark tracking system to several interventional devices using a real-time, threedimensional (3-D) ultrasound system. These results showed that we needed to improve the efficiency and reliability of the tracking. In this paper, we describe an analytical model to predict the transverse vibrations along the length of an atrial septal puncture needle to enable design improvements of the tracking system. We assume the needle can be modeled as a hollow bar with a circular cross section with a fixed proximal end and a free distal end that is suspended vertically to ignore gravity effects. The initial results show an ability to predict the natural nodes and antinodes along the needle using the characteristic equation for free vibrations. Simulations show that applying a forcing function to the device at a natural antinode yields an order of magnitude larger vibration than when driving the device at a node. Pulsed wave spectral Doppler data was acquired along the distal portion of the needle in a water tank using a 2-D matrix array transesophageal echocardiography probe. This data was compared to simulations of forced vibrations from the model. These initial results suggest that the model is a good first order approximation of the vibrating device in a water tank. It is our belief that knowing the location of the natural nodes and antinodes will improve our ability to drive the device to ensure the vibrations at the proximal end will reach the tip of the device, which in turn should improve our ability to track the device in vivo.

show abstract

Section: Resultsmentioning

confidence: 99%

“…A custom designed transesophageal ultrasound probe capable of acquiring 3-D echo, 3-D color Doppler, and 3-D PW spectral Doppler scanning was used. This probe has been described in detail by Pua et al [16].…”

Section: Ultrasound Experimentsmentioning

confidence: 99%

Analysis of a Vibrating Interventional Device to Improve 3-D Colormark Tracking

Fronheiser

Smith

2007

IEEE Trans. Ultrason., Ferroelect., Freq. Contr.

View full text Add to dashboard Cite

show abstract

“…The transducer used for all the described experiments is a 504 channel matrix array probe originally designed for transesophageal echocardiography (TEE) [15], as shown in Fig. 2(A).…”

Section: A Volumetrics Scanner System and 3-d Laparoscopic Probementioning

confidence: 99%

“…intracardiac catheters have been the catalyst for the recent fabrication of endoscopic [15] and laparoscopic [16] 3-D probes we have used for cardiac applications. These have been constructed with 504 active channels at operating frequencies ranging from 5 to 7 MHz.…”

Section: Introductionmentioning

confidence: 99%

3-D ultrasound guidance of surgical robotics: a feasibility study

Pua

Fronheiser

Noble

et al. 2006

IEEE Trans. Ultrason., Ferroelect., Freq. Contr.

View full text Add to dashboard Cite

Abstract-Laparoscopic ultrasound has seen increased use as a surgical aide in general, gynecological, and urological procedures. The application of real-time, threedimensional (RT3D) ultrasound to these laparoscopic procedures may increase information available to the surgeon and serve as an additional intraoperative guidance tool. The integration of RT3D with recent advances in robotic surgery also can increase automation and ease of use. In this study, a 1-cm diameter probe for RT3D has been used laparoscopically for in vivo imaging of a canine. The probe, which operates at 5 MHz, was used to image the spleen, liver, and gall bladder as well as to guide surgical instruments. Furthermore, the three-dimensional (3-D) measurement system of the volumetric scanner used with this probe was tested as a guidance mechanism for a robotic linear motion system in order to simulate the feasibility of RT3D/robotic surgery integration. Using images acquired with the 3-D laparoscopic ultrasound device, coordinates were acquired by the scanner and used to direct a robotically controlled needle toward desired in vitro targets as well as targets in a post-mortem canine. The rms error for these measurements was 1.34 mm using optical alignment and 0.76 mm using ultrasound alignment.

show abstract

“…The pattern is shown in figure 4A, and the resulting Field II 17 For the 7 MHz laparoscope, we adapted a design we have previously used for a side viewing transesophageal endoscope. 18 This transducer was designed for 504 active channels to fit into a typical endoscope. The aperture size is limited to 6.5 mm to fit into the ID of the endoscope.…”

Section: Volumetric Scanner Systemmentioning

confidence: 99%

Real-Time 3D Laparoscopic Ultrasonography

et al. 2005

View full text Add to dashboard Cite

We have previously described 2D array ultrasound transducers operating up to 10 MHz for applications including real time 3D transthoracic imaging, real time volumetric intracardiac echocardiography (ICE), real time 3D intravascular ultrasound (IVUS) imaging. We have recently built a pair of 2D array transducers for real time 3D laparoscopic ultrasonography (3D LUS), and real time 3D transesophageal echocardiography (TEE). These transducers are intended to be placed down a trocar during minimally invasive surgery. The first is a forward viewing 5 MHz, 11 x 19 array with 198 operating elements. It was built on an 8 layer multi-layer flex circuit. The interelement spacing is 0.20 mm yielding an aperture that is 2.2 mm x 3.8 mm. The O.D. of the completed transducer is 10.2 mm , and includes a 2 mm tool port. The average measured center frequency is 4.5 MHz, and the -6 dB bandwidth ranges from 15% to 30%. The 50 Ohm insertion loss, including Gore MicroFlat cabling, is -81.2 dB. The second transducer is a 7 MHz, 36 x 36 array with 504 operating elements. It was built upon a 10 layer multi-layer flex circuit. This transducer is in the forward viewing configuration, and the interelement spacing is 0.18 mm. The total aperture size is 6.48 mm x 6.48 mm. The O.D. of the completed transducer is 11.4 mm. The average measured center frequency is 7.2 MHz, and the -6 dB bandwidth ranges from 18% to 33%. The 50 Ohm insertion loss is -79.5 dB, including Gore MicroFlat cable. Real time in vivo 3D images of canine hearts have been made including an apical 4 chamber view from a substernal access with the first transducer to monitor cardiac function. In addition we produced real time 3D rendered images of the right pulmonary veins from a right parasternal access with the second transducer which would be valuable in the guidance of cardiac ablation catheters for treatment of atrial fibrillation.

show abstract

Real-time 3D transesophageal echocardiography

Cited by 19 publications

References 5 publications

Analysis of a Vibrating Interventional Device to Improve 3-D Colormark Tracking

Analysis of a Vibrating Interventional Device to Improve 3-D Colormark Tracking

3-D ultrasound guidance of surgical robotics: a feasibility study

Real-Time 3D Laparoscopic Ultrasonography

Contact Info

Product

Resources

About