Xiajuxu, but not Ximen. These elements may be important in the function of acupuncture Each acupuncture point seems to be elliptical with the long axis along the meridian. Acknowledgment This work is supported by the National Basic Research Program of China(no. 2006CB504509) and the Project of the State Key Program of the National Natural Science Foundation of China ( Grant no. 10635060). The international ethical guidelines for biomedical research involving human subjects are abided in our study Borjesson J, Mattsson S and Alpsten M 1998 Trace element concentrations studied analysis Appl. Radiat. Isot. 49 437-45 Bush V J, Moyer T P, Batts K P and Parisi J E 1995 Essential and toxic element concentrations in fresh and formalin-fixed human autopsy tissues Clin. Chem. 41 284-94 ChenEY, Shen X Y,, Dang R S, Chen H S, Cai D H, He w Q and Fei L 1998 Relationship of points of gallbladder meridian to connective tissue structure and element Ca Shanghai J. Acupunct. Moxibustion 17 36-7 Cheng x 1987 Chinese Acup re and Moxibustion(Beijing: Foreign Language Press eiLChenHS,Cai D H, Yang S X, Xu JR, Chen E Y, Dang R S,Die gestion l of points of lung meridian of Dang R S, Chen E Y, Shen X Y, Zhu WJ, Wang P J and Fei L 1997 Relationship of points of lung meridian of hand- Tarvin nnective tissue structure Shanghai. Acl and Practice of X-ray spectrometric Ana dn(New York: Plenum) chapters 2-4 Shen X Y and Tang Y 1998 Study tation and exploration on basic materials and functions of meridians Sci. Forem 43 658- Geraki K, Farquharson MJ and Bradley d A 2004 X-ray Huorescence and rsive x-ray diffraction for the uantification of elemental concentrations in breast tissue Phys. Med. Biol. 49 99-110 Greenberg DA 1997 Calcium channels in gical disease Ann. Neuro. 42 275-82 Krause MO 1979 Atomic radiative and radiationless yields for K and L shells J. Phys. Chem. Ref. Data 8 307-27 Langevin H M and Yandow J A 2002 Relationship of acupuncture points and meridians to connective tissue planes Anat.ReC.269257-65 Lobinski R, Moulin C and Ortega R 2006 Imaging and speciation of trace elements in biological environment Biochimie 88 1591-604 Ma LD and Yang FJ 2000 Applications of Synchrotron Radiation(Shanghai: Fudan University Press)chapter 7 O'Connor J and Bensky D 1981 Acupuncture: A Comprehensive Text(Shanghai College of Traditional Medicine) ( Seattle: Eastland Press) Theo. the atomic range 22<Z<30 using photoionisation Rad. Phys. Chem. 58 207-1I elds of some elements in Simsek O, Dogan O, Turgut U and Ertugrul M 2000 Measurement of K shell fluorescence yields of some elements in Theobald H E 2005 Dietary calcium and health Nutr. Bull. 30 237-77 Theodorakou C and Farquharson M J 2008 Human soft tissue analysis using x-ray or gamma-ray techniques Phys. Med. biol. 53 R1ll-4s Valkovic V and MoschiniG 1993 The use of synchrotron radiation for trace element analysis of biomedical samples Riv Nuovo Cimento 161-55 Van Espen P, Janssens K and Swensters I 1989 AXIL X-Ray Analysis Sofwware-Users Manual(Benelux: Canberra- Zhao GQ, Ren Z G and Yang F J 1989 Nuclear Analytical Techniques(Beijing: Atomic Energy Press/Vc Vaughan D 1986 X-Ray Data Booklet( California: Lawrence Berkeley Laboratory University of California) chapter 2N150 X Yan et al Xiajuxu, but not Ximen. These elements may be important in the function of acupuncture. Each acupuncture point seems to be elliptical with the long axis along the meridian. Acknowledgment This work is supported by the National Basic Research Program of China (no. 2006CB504509) and the Project of the State Key Program of the National Natural Science Foundation of China (Grant no. 10635060). The international ethical guidelines for biomedical research involving human subjects are abided in our study. References Borjesson J, Mattsson S and Alpsten M 1998 Trace element concentrations studied ¨ in vivo using x-ray fluorescence analysis Appl. Radiat. Isot. 49 437–45 Bush V J, Moyer T P, Batts K P and Parisi J E 1995 Essential and toxic element concentrations in fresh and formalin-fixed human autopsy tissues Clin. Chem. 41 284–94 Chen E Y, Shen X Y,, Dang R S, Chen H S, Cai D H, He W Q and Fei L 1998 Relationship of points of gallbladder meridian to connective tissue structure and element Ca Shanghai J. Acupunct. Moxibustion 17 36–7 Cheng X 1987 Chinese Acupuncture and Moxibustion (Beijing: Foreign Language Press) Dang R S, Chen E Y, Shen X Y, Zhu W J, Wang P J and Fei L 1997 Relationship of points of lung meridian of hand-Taiyin to connective tissue structure Shanghai J. Acupunct. Moxibustion 16 47–9 Eugene P B 1975 Principles and Practice of X-ray Spectrometric Analysis 2nd edn (New York: Plenum) chapters 2–4 Fei L, Chen H S, Cai D H, Yang S X, Xu J R, Chen E Y, Dang R S, Ding G H, Shen X Y and Tang Y 1998 Study expectation and exploration on basic materials and functions of meridians Sci. Forum 43 658–72 Geraki K, Farquharson M J and Bradley D A 2004 X-ray fluorescence and energy dispersive x-ray diffraction for the quantification of elemental concentrations in breast tissue Phys. Med. Biol. 49 99–110 Greenberg D A 1997 Calcium channels in neurological disease Ann. Neurol. 42 275–82 Krause M O 1979 Atomic radiative and radiationless yields for K and L shells J. Phys. Chem. Ref. Data 8 307–27 Langevin H M and Yandow J A 2002 Relationship of acupuncture points and meridians to connective tissue planes Anat. Rec. 269 257–65 Lobinski R, Moulin C and Ortega R 2006 Imaging and speciation of trace elements in biological environment Biochimie 88 1591–604 Ma L D and Yang F J 2000 Applications of Synchrotron Radiation (Shanghai: Fudan University Press) chapter 7 O’Connor J and Bensky D 1981 Acupuncture: A Comprehensive Text (Shanghai College of Traditional Medicine) (Seattle: Eastland Press) S¸ims¸ek O, Do ¨ gan O, Turgut ˘ U and Ertu ¨ grul M 2000 Measurement of K shell fluorescence yields of some elements in ˘ the atomic range 22 Z 30 using photoionisation Rad. Phys. Chem. 58 207–11 Theobald H E 2005 Dietary calcium and health Nutr. Bull. 30 237–77 Theodorakou C and Farquharson M J 2008 Human soft tissue analysis using x-ray or gamma-ray techniques Phys. Med. Biol. 53 R111–49 Valkovic V and Moschini G 1993 The use of synchrotron radiation for trace element analysis of biomedical samples Riv. 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