1 physical basis of dermatologic radiotherapy.- 1.1 Electromagnetic Radiation.- 1.2 Production of X Rays.- 1.3 The X-Ray Tube.- 1.4 Radiation Quality.- 1.5 Radiation Quantity.- 1.6 Interaction of X Radiation and Matter.- 1.7 Radiation Dosimetry.- 1.8 Selection of Physical Treatment Factors.- 1.9 Methods of Dermatologic Radiotherapy.- 1.10 Roentgen Therapy Apparatus Used in Dermatologic Radiation Therapy.- 1.11 Radionuclides.- 2 general radiobiology.- 2.1 Introduction.- 2.2 Primary Reactions to Physical Processes.- 2.3 Factors Influencing the Response to Radiation.- 2.4 Absorption of X Rays in Skin, Subcutaneous Tissue, Cartilage, and Bone.- 2.5 Effects of X Rays on Skin and Skin Appendages.- 3 radiation safety and protection.- 3.1 General Considerations.- 3.2 Shielding.- 3.3 Dose Limits.- 4 radiotherapy of cutaneous tumors.- 4.1 General Considerations.- 4.2 Radiotherapy of Malignant Epithelial Tumors of the Skin.- 4.3 Radiotherapy of Malignant Melanoma.- 4.4 Radiotherapy of Malignant Mesodermal Neoplasms (Sarcomas).- 4.5 Radiotherapy of Cutaneous Lymphomas, Reticuloses, and Leukemias.- 4.6 Radiotherapy of Premalignant Skin Conditions.- 4.7 Radiotherapy of Benign Skin Tumors.- 5 radiotherapy of benign dermatoses.- 5.1 General Considerations.- 5.2 Specific Indications.- 6 teleroentgen therapy of generalized dermatoses.- 6.1 General Considerations.- 6.2 Physical Foundation of Teleroentgen Therapy.- 6.3 Radiation Protection in Teleroentgen Therapy.- 6.4 Technical Procedure.- 6.5 Indications for Teleroentgen Therapy.