Motion Management in a Patient With Tracheostomy During Lung Stereotactic Body Radiation Therapy: Breath Hold Is Worth a Try oleh Lena Kaestner, MD, Yasser Abo-Madyan, MD, Lena Huber, MD, Manon Spaniol, MSc, Kerstin Siebenlist, MSc, Marie-Kristin Sacks, MSc, Michael Ehmann, MD, Florian Stieler, PhD, Sven Clausen, PhD, Frank Lohr, MD, Jens Fleckenstein, PhD, Judit Boda-Heggemann, MD, PhD