T2, MTR, and IHMTR measurements in a phantom using a pulsed IHMT sequence. Tubes containing heat denatured ovalbumin, row 1, hair conditioner, row 2, and solutions with increasing concentrations of MnCl in deionized water, rows 3-10, were arrayed in a Styrofoam holder. Measured T2 (A), MTR(B), and IHMTR (C) are shown. A slight indication of direct saturation effects on MTR is apparent in the shortest T2 phantoms, row 13, but no direct IHMT effects are apparent. Heat denatured ovalbumin shows substantial MT but negligible IHMT. Only hair conditioner, with a molecular and lamellar structure similar to membranes, shows significant IHMT.