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¿­Àü½Ö¸¶½ºÅ©¸¦ ÀÌ¿ëÇÑ È£Èí¸ð»çÆÒÅè ¿¬±¸ Study of Respiration Simulating Phantom using Thermocouple-based Respiration Monitoring Mask

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Abstract

¸ñ Àû: È£Èíµ¿±âÄ¡·á, È£ÈíÁ¶Àý ¹æ»ç¼±Ä¡·á µî È£Èí¿¡ °ü·ÃµÈ Ä¡·á¹ýÀÇ ¿¬±¸¸¦ À§ÇØ ¿­Àü½Ö¸¶½ºÅ©(Respiration Monitoring Mask: ReMM)¸¦ ÀÌ¿ëÇÑ È£Èí¸ð»çÆÒÅèÀ» °³¹ßÇÏ¿´´Ù.

´ë»ó ¹× ¹æ¹ý: È£Èí½ÅÈ£¿¡ µû¶ó ½Ç½Ã°£À¸·Î ¿òÁ÷À̴ ȣÈí¸ð»çÆÒÅèÀ» Á¦ÀÛÇÏ¿´´Ù. ¿­Àü½ÖÀ¸·Î ȯÀÚÀÇ È£ÈíÀ» ÃøÁ¤ÇÏ°í, ÃøÁ¤µÈ È£Èí ½ÅÈ£¿Í Àå±âÀÇ ¿òÁ÷ÀÓÀ» ºñ±³, ºÐ¼®ÇÏ¿© ÆÒÅèÀÇ ¼º´ÉÀ» Æò°¡ÇÏ¿´´Ù. ȯÀÚÀÇ È£Èí ÃøÁ¤¿¡´Â º»¿ø¿¡¼­ °³¹ßÇÑ ReMMÀ» »ç¿ëÇÏ¿´À¸¸ç, È£Èí¸ð»çÆÒÅèÀÇ ¿îµ¿Àº RPM¨Þ(Real-time Position Management, Varian, USA)À¸·Î ÃøÁ¤ÇÏ¿´´Ù. Ⱦ°Ý¸· ºÎÀ§ÀÇ Àå±â ¿îµ¿À» È®ÀÎÇϱâ À§ÇÏ¿© X-¼± Åõ½Ã±â¸¦ »ç¿ëÇÏ¿´´Ù.

°á °ú: X-¼± Åõ½Ã¿µ»ó°ú RPM¨ÞÀ¸·Î °üÂûÇÑ Àå±âÀÇ ¿òÁ÷ÀÓÀ» ReMMÀ¸·Î ÃøÁ¤ÇÑ È£Èí ½ÅÈ£¿Í ºñ±³ÇßÀ» °æ¿ì, °¢°¢ Ç¥ÁØÆíÂ÷ 9.68% ¹× 8.53% À̳»¿¡¼­ ÀÏÄ¡ÇÏ¿´´Ù. È£Èí ½ÅÈ£¿¡ µû¸¥ ÆÒÅè ¿îµ¿ÀÇ ¿ÀÂ÷´Â È£ÈíÁøÆø¿¡ ´ëÇÏ¿© Ç¥ÁØÆíÂ÷ 8.52%À̳»¿¡¼­ ÀÏÄ¡ÇÏ¿´´Ù.

°á ·Ð: ReMMÀº ȯÀÚ°¡ È£ÈíÀ» Çϴµ¥ ºÒÆíÇÔÀÌ ¾ø¾ú°í, ¿­Àü½Ö¿¡¼­ ¹ß»ýµÇ´Â È£Èí ½ÅÈ£¸¦ ÀÌ¿ëÇÑ È£Èí¸ð»ç ÆÒÅèÀº Àå±âÀÇ ¿îµ¿À» ½Ç½Ã°£À¸·Î Àß ¸ð»çÇÏ¿´´Ù. È£Èí¸ð»çÆÒÅèÀº È£Èíµ¿±âÄ¡·á µî ´Ù¾çÇÑ Ä¡·á¹ýÀÇ Æò°¡¿¡ ÀÀ¿ëÇÒ ¼ö ÀÖÀ» °ÍÀ¸·Î ±â´ëÇÑ´Ù.

Purpose: To develop the respiration simulating phantom with thermocouple for evaluating 4D radiotherapy such as gated radiotherapy, breathing control radiotherapy and dynamic tumor tracking radiotherapy.

Materials and Methods: The respiration monitoring mask (ReMM) with thermocouple was developed to monitor the patient¡¯s irregular respiration. The signal from ReMM controls the simulating phantom as organ motion of patients in real-time. The organ and the phantom motion were compared with its respiratory curves to evaluate the simulating phantom. ReMM was used to measure patients¡¯ respiration, and the movement of simulating phantom was measured by using RPMⓇ. The fluoroscope was used to monitor the patient¡¯s diaphragm motion.

Results: Comparing with the curves of respiration measured by thermocouple and those of the organ motion measured by fluoroscope and RPM, the standard deviations between the curves were 9.68% and 8.53% relative to the organ motion, respectively. The standard deviation of discrepancy between the respiratory curve and the organ motion was 8.52% of motion range.

Conclusion: Patients felt comfortable with ReMM. The relationship between the signal from ReMM and the organ motion shows strong correlation. The phantom simulates the organ motion in real-time according to the respiratory signal from the ReMM. It is expected that the simulating phantom with ReMM could be used to verify the 4D radiotherapy.

Å°¿öµå

¿­Àü½Ö¸¶½ºÅ©(ReMM);È£Èíµ¿±â¹æ»ç¼±Ä¡·á;È£Èí¸ð»çÆÒÅè;Respiration monitoring mask (ReMM);4D radiotherapy;Respiration simulating phantom

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