The present invention relates to a photosensitive composition, which is capable of being irradiated with high energy beam having a wave length of 1 to 300 nm band. The invention also relates to a method of positioning a garment while breastfeeding. The blood vessel image data have pixel values corresponding to times at which the concentrations of the contrast agent become a specific condition. The curtain may surround, divide andor provide privacy to a specific area andor confined space.