• 제목/요약/키워드: Laser Head

검색결과 301건 처리시간 0.03초

후두아밀로이드증 1례 (A Case of Laryngeal Amyloidosis)

  • 박호정;유강목;송종석;최건;정광윤;최종욱
    • 대한기관식도과학회지
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    • 제2권1호
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    • pp.135-139
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    • 1996
  • Laryngeal amyloidosis is a rare benign disease. It is characterized by extracellular deposition of homogeneous and eosinophilic protein material in the form of fibrils. Diagnosis of this disease is made by histologic examination of involved tissue. It is ususlly primary or localized but rarely associated with a systemic or generalized disease. We present a case of primary laryngeal amyloidosis that was treated with KTP 532 laser vaporization.

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피열부에 발생한 해면상 혈관종 1예 (A Case of Cavernous Hemangioma Occurred in Arytenoid)

  • 김태환;김소연;이상혁;진성민
    • 대한후두음성언어의학회지
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    • 제26권1호
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    • pp.54-57
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    • 2015
  • Hemangioma is one of the most common benign neoplasm, which occurs about 50% in head and neck region, but laryngeal hemangioma is relatively rare. Hemangioma occurred in larynx can be treated by surgical removal, cryosurgery, and steroid injection. Transoral CO2 laser micorsurgery has been known as useful method for the treatment of laryngeal hemangioma. We have experienced a 54-years old male patient of hemangioma originated in arytenoid area. This mass was removed via transoral approach with 'en bloc' resection by CO2 laser. We report this case regarding the treatment and prognosis of laryngeal hemangioma with review of literatures.

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ALA 및 ALA-Methylester의 투여에 따른 종양조직 및 정상조직에의 분포양상에 대한 연구 (Distribution Patterns in the Tumor Tissue and Normal Tissue according to the Administration Methods of ALA and ALA-Methylester)

  • 정필상;정상운;안진철;이상준;윤준식
    • 대한두경부종양학회지
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    • 제19권1호
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    • pp.21-24
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    • 2003
  • Objectives: In this report, we confirmed the distributed pattern of ALA and ALA-methylester in normal and tumor-bearing region. Materials and Methods: ALA and ALA-methylester were administered to nude mouse by intratumoral, subcutaneous and intravenous injection. After injection, the fluorescence in normal and tumor region was measured by LESA (laser electronic spectrum analyzer). Results: The tumor-specificity of ALA and ALA-methylester was shown in the case of intratumoral injection. In all case, the fluorescence caused by ALA and ALA-methylester was maximally increased in 2 hours after injection. Then while the fluorescence level was rapidly decreased to control level in normal region, it was still remained in tumor region. Conclusion: According to this result, The intratumoral injection was more efficient administration method for PDT/PDD than subcutaneous and intravenous injection.

인체 편평상피세포암세포주에서 9-Hydroxypheophorbide-$\alpha$와 660nm Diode 레이저를 이용한 광역학치료의 항암효과 (Anticancer Effect of Photodynamic Therapy using 9-Hydroxypheophorbide-$\alpha$ and 660nm Diode Laser on Human Squamous Cell Carcinoma Cell Line)

  • 김한균
    • 대한두경부종양학회지
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    • 제17권1호
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    • pp.3-7
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    • 2001
  • Objectives: New photosensitizer 9-hydroxypheophorbide-$\alpha$(9-HpbD-$\alpha$) was derived from chlorophyll in water with peak absorption at 660nm. 9-HpbD-$\alpha$ was tested with 660 nm diode laser for the anticancer effect of photodynamic therapy. Materials and Methods: Human SNU 1041 cells were seeded into 96 well plate at a density of $$ cells/well for 24 hours. Cells were washed with media containing various concentration of 9-HpbD-$\alpha$ ranging from $0{\mu}g/ml\;to\;3.75{\mu}g/ml$. Then, laser treatment was done with 660nm diode laser ($10mW/cm^2$) at various time setting (0, 30, 60, 90, 120 minutes) and with various time interval (0, 1, 4, 6, 18 hours). The treated cells were incubated 48 hours and MTT assay was done to measure the viability of cells. Results: The viability of cells was more than 90% after laser treatment in control group. The viability of cells was decreased with increasing concentration of 9-HpbD-$\alpha$ and laser treatment time in experimental groups. The viability of cells was decreased significantly as the interval time between addition of 9-HpbD-$\alpha$ and laser irradiation was increased. Conclusion: This study shows the anticancer effect of photodynamic therapy using 9-HpbD-$\alpha$ and 660nm Diode laser on carcinoma cell line. 9-HpbD-$\alpha$ is considerd as one of new photo sensitizers in the field of photodynamic therapy.

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경구강 레이저 및 로봇 수술 (Transoral Laser and Robotic Surgery)

  • 노종렬;유창환
    • 대한기관식도과학회지
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    • 제17권1호
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    • pp.29-34
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    • 2011
  • Traditionally, the main strategy of treatment of the head and neck cancer was en bloc resection including adjacent normal tissues through wide incision. However, the procedures may leave severe functional deficit such as swallowing difficulty, aspiration, and wide neck scar. Therefore, many attempts have been made up to minimize these morbidities. Of them, the minimal invasive approach such as transoral laser microsurgery (TLM) and transoral robot surgery (TORS) have been spolighted as a sensible strategy for organ preservation of the head and neck cancer patients. Results of TLM are equivalent to those obtained by conventional surgery, with considerably less morbidity, less hospital time and better postoperative function. Oncologic results of TLM are equivalent to conventional surgery. TORS are safe, feasible, and promising but oncologic safety is not yet verified. This article covers to current application of TLM and TORS, their advantages and limitations, and future direction.

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디지털 VCR 헤드 드럼의 밸런싱 연구 (Balancing of Digital VCR Head Drum)

  • 조여욱;이진구
    • 한국정밀공학회지
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    • 제15권2호
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    • pp.61-67
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    • 1998
  • Dynamic stability in rotation of the head drum of digital VCR is very important due to the nature of high rotation speed and small angular inertia. Therefore special considerations on reducing the unbalance and assuring the stability are required the design and manufacturing process. In this paper, newly developed digital head drum is introduced. And advanced methods in analyzing and reducing the unbalance is suggested. LDV(Laser Doppler Vibrometer) was used as a measurement system verifying our modeling and new method for balancing. Experiments show that the theoretical data estimated by modeling of shaft bending caused by unbalance mass and the measured data are almost identical. The deflection was reduced to 30% by applying the suggested balancing method.

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머신비전을 이용한 나사 머리 성형 펀치의 검사 알고리즘 (Inspection Algorithm for Screw Head Forming Punch Using Based on Machine Vision)

  • 정구현;정성엽
    • 융복합기술연구소 논문집
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    • 제3권2호
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    • pp.31-37
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    • 2013
  • This paper proposes a vision-based inspection algorithm for a punch which is used when forming the head of the small screws. To maintain good quality of punch, the precise inspection of its dimension and the depth of the punch head is important. A CCD camera and an illumination dome light are used to measure its dimensions. And a structured line laser is also used to measure the depth of the punch head. Resolution and visible area depend on setup between laser and camera which is determined using CAD-based simulation. The proposed method is successfully evaluated using experiment on #2 punch.

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Potassium-Titanyl-Phosphate 레이저를 이용하여 제거한 기관 육아종 1예 (A Case of Tracheal Granuloma Removal using Potassium-Titanyl-Phosphate Laser)

  • 홍지송;이길준
    • 대한후두음성언어의학회지
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    • 제31권2호
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    • pp.92-95
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    • 2020
  • Tracheal granuloma, the most commonly reported sequela of pediatric tracheotomy. A variety of techniques are available for the management of tracheal granuloma. Potassium-titanyl-phosphate (KTP) laser has been previously established as an acceptable technique for removal of laryngeal surgery, which emits a green light with a wave length of 532 nm, which is well-absorbed by hemoglobin and can coagulate and vaporize tissue. The ability to deliver laser energy through a flexible glass fiber makes the technique convenient for use with a rigid bronchoscope, overcoming problems with intraluminal access encountered with earlier attempts at CO2 laser therapy for this problem. Another advantage of KTP laser is the avoidance of the risks and morbidity associated with an open procedure. We report our surgical technique KTP laser in the management of tracheal granuloma removal into the tracheostomy site. KTP laser is good tool for management of tracheal granuloma with low incidence of complications.

초기 상후두암종에서 레이저를 이용한 내시경하 상후두부분절제술의 적용 (Clinical Application of Endoscopic Laser Assisted Supraglottic Partial Laryngectomy in Early Supraglottic Cancer)

  • 최종욱;권기환;오준환;한승훈;이승훈;최건
    • 대한두경부종양학회지
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    • 제14권2호
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    • pp.164-168
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    • 1998
  • 레이저를 이용한 내시경하 상후두부분절제술은 술전에 정확한 병기판정으로 초기 국소병변의 선택을 신중하게 하고 경부 림프절전이의 치료를 효율적으로 시행하는 경우 기존의 수술법과 유사한 생존율을 얻을 수 있었다. 환자의 상태에 따라서 충분한 수술시야를 확보하는데 어려움이 있으며, 병변의 위치에 따라서 술중 절제연의 확인이 힘들다는 제한점을 고려해야 하며, 술 후 발생할 수 있는 출혈, 부종, 오연 등의 합병증에 대비하기 위하여 술 전 기관절개술이 유용할 것으로 생각된다.

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