TY - JOUR T1 - 3D cross section of the laryngotracheal tract. A new method for visualization and quantification of tracheal stenoses JF - RADIOLOGE Y1 - 2003 A1 - Erich Sorantin A1 - Csongor Halmai A1 - Balázs Erdőhelyi A1 - Kálmán Palágyi A1 - László Gábor Nyúl A1 - Krisztián Ollé A1 - Franz Lindbichler A1 - Gerhard Friedrich A1 - Karl Kiesler AB - PURPOSE: Demonstration of a technique for 3D assessment oftracheal stenoses, regarding site, length and degree, based on spiral computed tomography (S-CT). PATIENTS AND METHODS: S-CT scanning and automated segmentation of the laryngo-tracheal tract (LTT) was followed by the extraction of the LTT medial axis using a skeletonisation algorithm. Orthogonal to the medial axis the LTT 3D cross sectional profile was computed and presented as line charts, where degree and length were obtained. Values for both parameters were compared between 36 patients and 18 normal controls separately. Accuracy and precision was derived from 17 phantom studies. RESULTS: Average degree and length of tracheal stenoses were found to be 60.5% and 4.32 cm in patients compared to minor caliber changes of 8.8% and 2.31 cm in normal controls (p <0.005). For the phantoms an excellent correlation between the true and computed 3D cross sectional profile was found (p <0.005) and an accuracy for length and degree measurements of 2.14 mm and 2.53% respectively could be determined. The corresponding figures for the precision were found to be 0.92 mm and 2.56%. CONCLUSION: LTT 3D cross sectional profiles permit objective, accurate and precise assessment of LTT caliber changes. Minor LTT caliber changes can be observed even in normals and, in case of an otherwise normal S-CT study, can be regarded as artefacts. VL - 43 SN - 0033-832X IS - 12 N1 - UT: 000188058500005ScopusID: 9144241258doi: 10.1007/s00117-003-0990-8 JO - RADIOLOGE ER - TY - JOUR T1 - 3D cross section of the laryngotracheal tract. A new method for visualization and quantification of tracheal stenoses JF - RADIOLOGE Y1 - 2003 A1 - Erich Sorantin A1 - Csongor Halmai A1 - Balázs Erdőhelyi A1 - Kálmán Palágyi A1 - László Gábor Nyúl A1 - Krisztián Ollé A1 - Franz Lindbichler A1 - Gerhard Friedrich A1 - Karl Kiesler AB - PURPOSE: Demonstration of a technique for 3D assessment oftracheal stenoses, regarding site, length and degree, based on spiral computed tomography (S-CT). PATIENTS AND METHODS: S-CT scanning and automated segmentation of the laryngo-tracheal tract (LTT) was followed by the extraction of the LTT medial axis using a skeletonisation algorithm. Orthogonal to the medial axis the LTT 3D cross sectional profile was computed and presented as line charts, where degree and length were obtained. Values for both parameters were compared between 36 patients and 18 normal controls separately. Accuracy and precision was derived from 17 phantom studies. RESULTS: Average degree and length of tracheal stenoses were found to be 60.5% and 4.32 cm in patients compared to minor caliber changes of 8.8% and 2.31 cm in normal controls (p <0.005). For the phantoms an excellent correlation between the true and computed 3D cross sectional profile was found (p <0.005) and an accuracy for length and degree measurements of 2.14 mm and 2.53% respectively could be determined. The corresponding figures for the precision were found to be 0.92 mm and 2.56%. CONCLUSION: LTT 3D cross sectional profiles permit objective, accurate and precise assessment of LTT caliber changes. Minor LTT caliber changes can be observed even in normals and, in case of an otherwise normal S-CT study, can be regarded as artefacts. VL - 43 SN - 0033-832X IS - 12 N1 - UT: 000188058500005ScopusID: 9144241258doi: 10.1007/s00117-003-0990-8 JO - RADIOLOGE ER - TY - JOUR T1 - Spiral-CT-based assessment of tracheal stenoses using 3-D-skeletonization JF - IEEE TRANSACTIONS ON MEDICAL IMAGING Y1 - 2002 A1 - Erich Sorantin A1 - Csongor Halmai A1 - Balázs Erdőhelyi A1 - Kálmán Palágyi A1 - László Gábor Nyúl A1 - Krisztián Ollé A1 - Bernhard Geiger A1 - Franz Lindbichler A1 - Gerhard Friedrich A1 - Karl Kiesler AB - PURPOSE: Demonstration of a technique for three-dimensional (3-D) assessment of tracheal-stenoses, regarding site, length and degree, based on spiral computed tomography (S-CT). PATIENTS AND METHODS: S-CT scanning and automated segmentation of the laryngo-tracheal tract (LTT) was followed by the extraction of the LTT medial axis using a skeletonization algorithm. Orthogonal to the medial axis the LTT 3-D cross-sectional profile was computed and presented as line charts, where degree and length was obtained. Values for both parameters were compared between 36 patients and 18 normal controls separately. Accuracy and precision was derived from 17 phantom studies. RESULTS: Average degree and length of tracheal stenoses was found to be 60.5% and 4.32 cm in patients compared with minor caliber changes of 8.8% and 2.31 cm in normal controls (p << 0.0001). For the phantoms an excellent correlation between the true and computed 3-D cross-sectional profile was found (p << 0.005) and an accuracy for length and degree measurements of 2.14 mm and 2.53% respectively could be determined. The corresponding figures for the precision were found to be 0.92 mm and 2.56%. CONCLUSION: LTT 3-D cross-sectional profiles permit objective, accurate and precise assessment of LTT caliber changes. Minor LTT caliber changes can be observed even in normals and, in case of an otherwise normal S-CT study, can be regarded as artifacts. VL - 21 SN - 0278-0062 IS - 3 N1 - UT: 000175063900007ScopusID: 0036489382doi: 10.1109/42.996344 JO - IEEE T MED IMAGING ER -