The Experts below are selected from a list of 15 Experts worldwide ranked by ideXlab platform

Burhan Dadas - One of the best experts on this subject based on the ideXlab platform.

  • level of vocal folds as projected on the exterior Thyroid cartilage
    Laryngoscope, 2010
    Co-Authors: Ugur Cinar, Ozgur Yigit, Cetin Vural, Seyhan Alkan, Semra Kayaoglu, Burhan Dadas
    Abstract:

    Objective: This study aims to identify the level of the vocal folds as projected on the exterior Thyroid cartilage. Study Design: Anatomic study of human cadaver larynges. Methods: The study includes 83 fresh larynges harvested at autopsy from 62 male and 21 female cadavers. The larynges were excised and divided in the midline posteriorly. One needle was inserted at the level of anterior commissure from endolarynx, and the other was inserted at the Thyroid ala just anterior to the vocal process along the Superior surface of the right vocal cord. Measurements of vocal cord projections on the Thyroid ala were done with a caliper. Results: The mean value of the ratio of the distances from the Superior Thyroid Notch to anterior commissure and the midline height from Thyroid Notch to the inferior border of Thyroid cartilage was found to be 0.41 in males and 0.38 in females. No statistical differences were observed between these two groups (P = .062). We found that the distance from the anterior commissure to the inferior Thyroid border in midline “c” was longer than the distance from the posterior border of the vocal cord to the inferior border of the inferior tubercle of the Thyroid ala “d” in 44 (71%) males and in 7 (33%) females. On the other hand, “d” was longer than “c” in 8 (12.9%) males and in 8 (38.1%) females. These two distances were equal in 10 (16.1%) males and in 6 (28.6%) females. Conclusion: In this study, we found that the anterior commissure lies approximately at the juncture of the upper two fifths and lower three fifths of the midline height of Thyroid cartilage in the majority of the larynges of the male and female cadavers. The position of the posterior border of the vocal cords was found to be at a lower level than anterior commissure in two thirds of males and in one third of females. This means that the vocal cords slope downward posteriorly in the majority of the larynges of the males. This may be one of the causes of failure of some type I thyroplasties.

Liu Qian - One of the best experts on this subject based on the ideXlab platform.

  • the study of applied anatomy of prevention of the frontal branch of the facial nerve in rhytidectomy of separating smas
    China Practical Medicine, 2008
    Co-Authors: Liu Qian
    Abstract:

    Objective To investigate the applied anatomy of the frontal branch of the facial nerve,offer the anatomy basis for preventing the frontal branch of the facial nerve in rhytidectomy of separating SMAS.Methods On 4 fresh samples and 26 antiseptic samples,to dissect and observe the course of the frontal branch of the facial nerve,its' distributing and adjoining,we established the system of relevant coordinate,and got the site-specific coordinate parameter in the body surface and the distribution characteristic of the frontal branch of the facial nerve.Results The course of the frontal branch of the facial nerve after sent out temporal branches wrer from decoct later to up-forward in deepen superficial temporal fascia,which distribution area liked fanning,and then some of anterior frontal branch of facial nerve entered frontal muscle,some of got into orbicularis oculi.The middle of the line which from Superior Thyroid Notch of tragus to lateral angle of eye was the origin o of system coordinates,the coordinate value that the right anterior branch of the frontal branch of facial nerve were:(0.0,-4.5±3.4)、(4.0,1.6±4.6)、(8.0,4.3±4.5)、(12.0,8.1±5.1)、(16.0,10.4±5.4)、(20.0,12.3±5.7)、(24.0,14.4±4.6)、(28.0,17.3±5.4);The coordinate value that the right posterior branch of the frontal branch of facial nerve were:(-20.0,1.1±5.4)、(-16.0,11.2±4.2)、(-12.0,17.3±5.5)、(-8.0,22.7±5.7)、(-4.0,26.4±5.5)、(0.0,28.1±5.1);The coordinate value that the left anterior branch of the frontal branch of facial nerve were:(4.0,-3.1±3.4)、(0.0,-2.5±3.7)、(-4.0,1.9±3.4)、(-8.0,4.7±5.2)、(-12.0,7.9.1±4.6)、(-16.0,11.3±5.1)、(-20.0,13.3±4.8)、(-24.0,15.4±4.4)、(-28.0,17.8±5.4);The coordinate value that the left posterior branch of the frontal branch of facial nerve were:(24.0,-1.0±3.4)、(20.0,1.8±4.3)、(16.0,10.6±5.1)、(12.0,16.7±5.7)、(8.0,23.3±4.9)、(4.0,25.8±5.7)、(0.0,27.9±5.8).Conclusion The clinician is familiar with the position and course of the frontal branch of the facial nerve,is favorable reducing the damage of the frontal branch of the facial nerve in rhytidectomy of separating.

Benson, Richard J - One of the best experts on this subject based on the ideXlab platform.

  • Anatomical change during radiotherapy for head and neck cancer, and its effect on delivered dose to the spinal cord.
    'Organisation for Economic Co-Operation and Development (OECD)', 2019
    Co-Authors: Noble David, Yeap Ping-lin, Shannon Yk Seah, Harrison Karl, Shelley Leila, Romanchikova Marina, Bates, Amy M, Zheng Yaolin, Barnett, Gillian C, Benson, Richard J
    Abstract:

    Background and purpose: The impact of weight loss and anatomical change during head and neck (H&N) radiotherapy on spinal cord dosimetry is poorly understood, limiting evidence-based adaptive management strategies. Materials and methods: 133 H&N patients treated with daily mega-voltage CT image-guidance (MVCT-IG) on TomoTherapy, were selected. Elastix software was used to deform planning scan SC contours to MVCT-IG scans, and accumulate dose. Planned (DP) and delivered (DA) spinal cord D2% (SCD2%) were compared. Univariate relationships between neck irradiation strategy (unilateral vs bilateral), T-stage, N-stage, weight loss, and changes in lateral separation (LND) and CT slice surface area (SSA) at C1 and the Superior Thyroid Notch (TN), and ΔSCD2% [(DA – DP) D2%] were examined. Results: The mean value for (DA – DP) D2% was -0.07Gy (95%CI -0.28 to 0.14, range -5.7Gy to 3.8Gy), and the mean absolute difference between DP and DA (independent of difference direction) was 0.9Gy (95%CI 0.76 to 1.04Gy). Neck treatment strategy (p=0.39) and T-stage (p=0.56) did not affect ΔSCD2%. Borderline significance (p=0.09) was seen for higher N-stage (N2-3) and higher ΔSCD2%. Mean reductions in anatomical metrics were substantial: weight loss 6.8kg; C1LND 12.9mm; C1SSA 12.1cm2; TNLND 5.3mm; TNSSA 11.2cm2, but no relationship between weight loss or anatomical change and ΔSCD2% was observed (all r2

Rj Benson - One of the best experts on this subject based on the ideXlab platform.

  • Anatomical change during radiotherapy for head and neck cancer, and its effect on delivered dose to the spinal cord
    2019
    Co-Authors: Dj Noble, Pl Yeap, Seah Syk, Harrison K, Shelley Lea, Romanchikova M, Am Bates, Zheng Y, Gc Barnett, Rj Benson
    Abstract:

    Background and purpose: The impact of weight loss and anatomical change during head and neck (H&N) radiotherapy on spinal cord dosimetry is poorly understood, limiting evidence-based adaptive management strategies. Materials and methods: 133 H&N patients treated with daily mega-voltage CT image-guidance (MVCT-IG) on TomoTherapy, were selected. Elastix software was used to deform planning scan SC contours to MVCT-IG scans, and accumulate dose. Planned (D P ) and delivered (D A ) spinal cord D 2% (SCD 2% ) were compared. Univariate relationships between neck irradiation strategy (unilateral vs bilateral), T-stage, N-stage, weight loss, and changes in lateral separation (LND) and CT slice surface area (SSA) at C1 and the Superior Thyroid Notch (TN), and ΔSCD 2% [(D A – D P ) D 2% ] were examined. Results: The mean value for (D A – D P ) D 2% was −0.07 Gy (95%CI −0.28 to 0.14, range −5.7 Gy to 3.8 Gy), and the mean absolute difference between D P and D A (independent of difference direction) was 0.9 Gy (95%CI 0.76–1.04 Gy). Neck treatment strategy (p = 0.39) and T-stage (p = 0.56) did not affect ΔSCD 2% . Borderline significance (p = 0.09) was seen for higher N-stage (N2-3) and higher ΔSCD 2% . Mean reductions in anatomical metrics were substantial: weight loss 6.8 kg; C1LND 12.9 mm; C1SSA 12.1 cm 2 ; TNLND 5.3 mm; TNSSA 11.2 cm 2 , but no relationship between weight loss or anatomical change and ΔSCD 2% was observed (all r 2 < 0.1). Conclusions: Differences between delivered and planned spinal cord D 2% are small in patients treated with daily IG. Even patients experiencing substantial weight loss or anatomical change during treatment do not require adaptive replanning for spinal cord safety

Peng Tianhong - One of the best experts on this subject based on the ideXlab platform.

  • applied anatomy of the frontal branch of facial nerve improvion of orientation with reference to surface marks
    Chinese Journal of Aesthetic Medicine, 2008
    Co-Authors: Peng Tianhong
    Abstract:

    Objective To position the frontal branch of facial nerve surface marks through the new way.Methods 20 fixed adult heads specimens were dissected,observe and measure the frontal branch of facial nerve's relative position on the lines,which are the sup dot of helix-sup dot of lateral angle of eye and Superior Thyroid Notch of tragus-lateral angle of eye using operation microscope.Results In the lines inside of the sup dot of helix-sup dot of lateral angle of eye,the frontal branch of facial nerve step over the scope of the line segment's lateral of(3/10～4/5)±1/10.In the line of Superior Notch of tragus-lateral angle of eye,the frontal branch of facial nerve step across the scope of this line segment's(1/5～1/2)±1/9.Conclusion The dangerous area where the frontal branch of facial nerve step over should be get out of the way in the face lifting.