110mIn-DTPA-d-Phe1-Octreotide for Imaging of Neuroendocrine Tumors with PET

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FIGURE 1.
Spatial resolution in PET and SPECT with ^110mIn and ¹¹¹In, respectively. Just outside FOV in SPECT measurement was 20-cm point. FWHM = full width at half maximum.
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FIGURE 2.
Sphere recovery functions for ^110mIn PET, ¹¹¹In SPECT, and ¹⁸F PET.
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FIGURE 3.
Reoriented reconstructed SPECT images 24 h after administration of 175 MBq of ¹¹¹In-octreotide. Rectangles indicate position of PET images in Figure 4.
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FIGURE 4.
Reoriented PET images of same patient as in Figure 3, 1.5 h after administration of ^110mIn-octreotide.
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FIGURE 5.
Standard uptake values of ^110mIn-octreotide in tumor, background tissue, blood, and kidney. Error bars are of same size as markers.

TABLE 1

Main Decay Radiation of ^110mIn and ¹¹¹In

Isotope	Half-life	Radiation	Energy (keV)	Abundance (%)
¹¹¹In	2.8 d	γ	245.4	94
			171.3	90.2
		Auger	2.72	98
			19.3	15.6
		Conversion electrons	144.6	7.8
		X-ray	23.2	44.3
			23.0	23.5
			26.1	14.5
^110mIn	69.1 min	β⁺, total	1,010 (maximum, 2,260)	62
		γ	657.8	98
		Auger	2.72	33.5
			19.3	5.3
		X-ray	23.2	15
			23.0	8