Surface imaging, laser positioning or volumetric imaging for breast cancer with nodal involvement treated by helical TomoTherapy. - Crop F; Pasquier D; Baczkiewic A; Doré J; Bequet L; Steux E; Gadroy A; Bouillon J; Florence C; Muszynski L; Lacour M; Lartigau E (Journal of applied clinical medical physics, 2016)