Entwicklung eines Trainingsmodells zur sonographischen Primärdiagnostik von Mittelgesichtsfrakturen

TY - JOUR

T1 - Entwicklung eines Trainingsmodells zur sonographischen Primärdiagnostik von Mittelgesichtsfrakturen

AU - Heiland, M

AU - Lenard, M

AU - Schmelzle, R

AU - Friedrich, R E

PY - 2004/7/1

Y1 - 2004/7/1

N2 - BACKGROUND: In uncertain midfacial fractures, sonography is an alternative first-line imaging modality to conventional radiographs. Patients with sonographically confirmed fractures can then be directly admitted to three-dimensional imaging, resulting in decreased radiation exposure since the conventional radiographs are omitted.MATERIAL AND METHODS: Using a high-frequency linear and curved array scanner in a healthy proband, images of the zygomatic arch, anterior maxillary sinus wall, infraorbital rim, and lateral orbital wall were obtained. For identification and anatomical allocation corresponding navigated ultrasound images of a reference skull were generated and fused with a segmented CT data set. Navigated sonography was reproduced in a patient with orbitozygomatical fracture of the left side. Therefore, the CT data set, performed during preoperative diagnostics, was fused with the ultrasound images.RESULTS: Because of different coupling shapes, the high-frequency linear array scanner was subjectively found to be more suitable for sonography in the field of the zygomatic arch, anterior maxillary sinus wall, and infraorbital rim, and the curved array scanner was better suited for transbulbar sonography of the orbital walls. After coupling sonography with the navigation system and referencing the scanner, it was possible to verify ultrasound findings objectively by navigation of the scanner and fusion with the CT data set. Using the reference skull, ultrasound images corresponding to normal findings were obtained and with the fused CT data, providing colored segmentation of the facial bones, an anatomically correct identification was possible. Clinical application of this tool is described in a patient with left-sided orbitozygomatical fracture.CONCLUSION: By fusion of ultrasound images and corresponding CT data with the help of a navigation system, a sonographic training tool for preliminary evaluation of midfacial fractures is available.

AB - BACKGROUND: In uncertain midfacial fractures, sonography is an alternative first-line imaging modality to conventional radiographs. Patients with sonographically confirmed fractures can then be directly admitted to three-dimensional imaging, resulting in decreased radiation exposure since the conventional radiographs are omitted.MATERIAL AND METHODS: Using a high-frequency linear and curved array scanner in a healthy proband, images of the zygomatic arch, anterior maxillary sinus wall, infraorbital rim, and lateral orbital wall were obtained. For identification and anatomical allocation corresponding navigated ultrasound images of a reference skull were generated and fused with a segmented CT data set. Navigated sonography was reproduced in a patient with orbitozygomatical fracture of the left side. Therefore, the CT data set, performed during preoperative diagnostics, was fused with the ultrasound images.RESULTS: Because of different coupling shapes, the high-frequency linear array scanner was subjectively found to be more suitable for sonography in the field of the zygomatic arch, anterior maxillary sinus wall, and infraorbital rim, and the curved array scanner was better suited for transbulbar sonography of the orbital walls. After coupling sonography with the navigation system and referencing the scanner, it was possible to verify ultrasound findings objectively by navigation of the scanner and fusion with the CT data set. Using the reference skull, ultrasound images corresponding to normal findings were obtained and with the fused CT data, providing colored segmentation of the facial bones, an anatomically correct identification was possible. Clinical application of this tool is described in a patient with left-sided orbitozygomatical fracture.CONCLUSION: By fusion of ultrasound images and corresponding CT data with the help of a navigation system, a sonographic training tool for preliminary evaluation of midfacial fractures is available.

KW - Diagnosis, Computer-Assisted

KW - Equipment Design

KW - Humans

KW - Image Processing, Computer-Assisted

KW - Imaging, Three-Dimensional

KW - Inservice Training

KW - Maxillary Sinus

KW - Maxillofacial Injuries

KW - Orbital Fractures

KW - Phantoms, Imaging

KW - Reference Values

KW - Skull Fractures

KW - Tomography, Spiral Computed

KW - Ultrasonography

KW - Zygomatic Fractures

U2 - 10.1007/s10006-004-0535-y

DO - 10.1007/s10006-004-0535-y

M3 - SCORING: Zeitschriftenaufsatz

C2 - 15293120

VL - 8

SP - 244

EP - 249

IS - 4

ER -