Biology:Deep inspiration breath-hold

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Short description: Method of delivering radiotherapy
DIBH treatment

Deep inspiration breath-hold (DIBH) is a method of delivering radiotherapy while limiting radiation exposure to the heart and lungs.[1] It is used primarily for treating left-sided breast cancer.

The technique involves a patient holding their breath during treatment. In DIBH techniques, treatment is only delivered at certain points in the breathing cycle, where the patient holds their breath. Since the relative positions of organs in the chest naturally changes during breathing, this allows treatment to be delivered to the target (tumour) while other organs are in the optimal position to receive least dose.[2]

File:Another DIBH treatment.tif

Treatment Methods

In the DIBH technique, the patient is initially maintained at quiet tidal breathing (i.e. normal, relaxed breathing),[3] followed by a deep inspiration, a deep expiration, a second deep inspiration, and breath-hold. At this point the patient is at approximately 100% vital capacity, and simulation, verification, and treatment take place during this phase of breath-holding.[4] DIBH is performed with several tangential fields for left-sided breast cancer. A patient is instructed to hold the breath while viewing the breathing pattern and the breath-hold position through a head-mounted mirror, thereby ensuring reproducibility of the breath-hold position in each delivery.[5] A pair of video goggles may also be used for monitoring the breathing cycle. Patients who cannot maintain DIBH can still benefit from lung tracking techniques, for example 4DCT.[6]

There are two basic methods of performing DIBH: free-breathing breath-hold, and spirometry-monitored deep inspiration breath hold.[7]

Free-breathing breath-hold

Free-breathing breath-hold, also known as real-time position management (RPM) DIBH utilises an infra-red camera and markers placed on the patient to track movement of their chest, and their breathing.[8] Another device for DIBH is known as Abches that monitors the breathing pattern.[9] With the Abches, a patient is instructed to hold the breath at a specified breathing position by viewing a breathing level indicator, thereby reproducing an identical breath-hold position.[10]

Spirometry-monitored breath-hold

Spirometry based designs are known as active breathing coordinator (ABC) DIBH systems. ABC utilises a mouth piece for the patient which can be used to control the flow of air to provide more reproducible results.[11]

Effectiveness

The DIBH technique provides an advantage to conventional free-breathing treatment by decreasing lung density, reducing normal safety margins, and enabling more accurate treatment. These improvements contribute to the effective exclusion of normal lung tissue from the high-dose region and permit the use of higher treatment doses without increased risks of toxicity.[4]

Treatment of patients with the DIBH technique is feasible in a clinical setting. With this technique, consistent lung inflation levels are achieved in patients, as judged by both spirometry and verification films. Breathing-induced tumor motion is significantly reduced using DIBH compared to free breathing, enabling better target coverage.[12]

Future research

There is currently no clear selection criteria to predict which patients will benefit most from the DIBH technique, other than left breast laterality. There is evidence to suggest parasagittal cardiac contact distance is a promising metric for selection and should be assessed in all future DIBH planning studies.[7]

References

  1. ↑ Hanley, Joseph; Debois, Marc M.; Mah, Dennis; Mageras, Gikas S.; Raben, Adam; Rosenzweig, Kenneth; Mychalczak, Borys; Schwartz, Lawrence H. et al. (1999). "Deep inspiration breath-hold technique for lung tumors: the potential value of target immobilization and reduced lung density in dose escalation" (in en). International Journal of Radiation Oncology, Biology, Physics 45 (3): 603–611. doi:10.1016/S0360-3016(99)00154-6. PMID 10524412. https://linkinghub.elsevier.com/retrieve/pii/S0360301699001546. 
  2. ↑ Morris, Frog. "Deep Inspiration Breath Hold technique • Radiotherapy UK" (in en-GB). https://radiotherapy.org.uk/support/considering-radiotherapy/deep-inspiration-breath-hold-dibh/. 
  3. ↑ Palmer, John; Allen, Julian; Mayer, Oscar (2004-05-01). "Tidal Breathing Analysis" (in en). NeoReviews 5 (5): e186–e193. doi:10.1542/neo.5-5-e186. ISSN 1526-9906. https://publications.aap.org/neoreviews/article/5/5/e186/88552/Tidal-Breathing-Analysis. 
  4. ↑ 4.0 4.1 Rosenzweig, Kenneth E; Hanley, Joseph; Mah, Dennis; Mageras, Gig; Hunt, Margie; Toner, Sean; Burman, Chandra; Ling, C.C et al. (2000). "The deep inspiration breath-hold technique in the treatment of inoperable non–small-cell lung cancer" (in en). International Journal of Radiation Oncology, Biology, Physics 48 (1): 81–87. doi:10.1016/S0360-3016(00)00583-6. PMID 10924975. https://linkinghub.elsevier.com/retrieve/pii/S0360301600005836. 
  5. ↑ Lee, Ha Yoon; Chang, Jee Suk; Lee, Ik Jae; Park, Kwangwoo; Kim, Yong Bae; Suh, Chang Ok; Kim, Jun Won; Keum, Ki Chang (2013). "The deep inspiration breath hold technique using Abches reduces cardiac dose in patients undergoing left-sided breast irradiation" (in en). Radiation Oncology Journal 31 (4): 239–246. doi:10.3857/roj.2013.31.4.239. ISSN 2234-1900. PMID 24501713. 
  6. ↑ Image-guided radiation therapy. J. Daniel Bourland. Boca Raton: Taylor & Francis. 2012. ISBN 978-1-4398-0274-8. OCLC 778508742. https://www.worldcat.org/oclc/778508742. 
  7. ↑ 7.0 7.1 Latty, Drew; Stuart, Kirsty E.; Wang, Wei; Ahern, Verity (2015). "Review of deep inspiration breath‐hold techniques for the treatment of breast cancer" (in en). Journal of Medical Radiation Sciences 62 (1): 74–81. doi:10.1002/jmrs.96. ISSN 2051-3895. PMID 26229670. 
  8. ↑ Stereotactic body radiation therapy : principles and practices. Yasushi Nagata. Tokyo. 2015. ISBN 978-4-431-54883-6. OCLC 917152789. https://www.worldcat.org/oclc/917152789. 
  9. ↑ Onishi, Hiroshi; Kawakami, Hideyuki; Marino, Kan; Komiyama, Takafumi; Kuriyama, Kengo; Araya, Masayuki; Saito, Ryo; Aoki, Shinichi et al. (2010). "A Simple Respiratory Indicator for Irradiation during Voluntary Breath Holding: A One-Touch Device without Electronic Materials" (in en). Radiology 255 (3): 917–923. doi:10.1148/radiol.10090890. ISSN 0033-8419. PMID 20501729. http://pubs.rsna.org/doi/10.1148/radiol.10090890. 
  10. ↑ Saito, Masahide; Kajihara, Daichi; Suzuki, Hidekazu; Komiyama, Takafumi; Marino, Kan; Aoki, Shinichi; Ueda, Koji; Sano, Naoki et al. (2022-01-11). "Reproducibility of deep inspiration breath‐hold technique for left‐side breast cancer with respiratory monitoring device, Abches" (in en). Journal of Applied Clinical Medical Physics 23 (4): e13529. doi:10.1002/acm2.13529. ISSN 1526-9914. PMID 35018712. 
  11. ↑ Radiation therapy techniques and treatment planning for breast cancer. Jennifer R. Bellon, Julia S. Wong, Shannon M. MacDonald, Alice Y. Ho. Cham. 2016. ISBN 978-3-319-40392-2. OCLC 961874437. https://www.worldcat.org/oclc/961874437. 
  12. ↑ Mah, Dennis; Hanley, Joseph; Rosenzweig, Kenneth E; Yorke, Ellen; Braban, Louise; Ling, C.Clifton; Leibel, Stephen A; Mageras, Gikas (2000). "Technical aspects of the deep inspiration breath-hold technique in the treatment of thoracic cancer" (in en). International Journal of Radiation Oncology, Biology, Physics 48 (4): 1175–1185. doi:10.1016/S0360-3016(00)00747-1. PMID 11072177. https://linkinghub.elsevier.com/retrieve/pii/S0360301600007471. 



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